Independent Electrical Contractors (IEC) Year 3 Practice Test

These questions are part of the practice quiz. Start practicing

• What is the locked-rotor current in amps for a 10 hp, single-phase motor operating at 120 volts with the nameplate showing code letter F?
• What type of switch is typically used for emergency stops in industrial settings?
• Which signs alert individuals to exercise caution in specific situations?
• To obtain a 3 second delay with the range setting at 9.99S, what should the time setting be set at?
• What is the minimum size of an equipment grounding conductor required for a circuit protected by a 100-ampere automatic overcurrent device?
• What happens if ground fault protection is compromised in a circuit?
• In an electrical circuit, what indicates that the circuit is functioning correctly with the ON DELAY setting?
• When multiple sets of conductors are used in flexible conduit, which of the following regulations typically applies?
• The control switching for a reversing starter can consist of ___.
• NEMA 3R enclosures can be used indoors.
• For a 480-volt, 15 hp motor with specific parameters, what is the minimum required overload protection size?
• What does NEMA symbol III signify in electrical schematics?
• Are "no smoking" areas necessary around flammable materials?
• Is it important to be aware of hazards created by other trades working nearby?
• In the context of electrical safety, what does "ground fault" refer to?
• The failure rate of SSRs ___ as the ambient temperature increases.
• What is the purpose of the equipment grounding conductor in electrical installations?
• When worn in construction, work boots should ___.
• What is a recommended practice when working with electrical systems?
• Which of the following is NOT a function of grounding?
• When should you expect the NO contacts to close in the ON-delay relay operation?
• Which of the following best describes intrinsic motivation?
• Factors that can increase a person's likelihood of heat illness include ____.
• In a numerical cross-reference system, which type of contacts are underlined?
• The equipment grounding conductor is permitted to be run separately from the circuit conductors when what occurs?
• How many windings per phase do dual-voltage 3-phase motors have?
• When sizing a main bonding jumper, which influencing factor is typically considered per the NEC®?
• What is the primary focus of safety in electrical work?
• Each winding in the referenced figure is rated to carry how many amps of current?
• You ___ react to any sudden and/or unexpected movements of drivers near you.
• For an OFF DELAY setting, which operational diagram indicates correct operation?
• In building construction, which of the following could potentially contain lead?
• What condition is described when a motor shaft cannot turn due to heavy loading?
• In a holding circuit, what happens when the manual pushbutton closes the circuit?
• One approach to organization is to list the ___ tasks first.
• When the float switch closes, the red light will stay OFF for how long according to the given scenario?
• Which type of cable is more secure against eavesdropping?
• What must you ensure is secure before pulling fiber optic cable?
• The minimum size circuit conductors permitted in figure 230.121 are what size in AWG?
• In a motor drive system, which component is responsible for changing voltage levels?
• If the maximum permitted tension is exceeded when installing UTP cable, the performance can be affected due to ___.
• Which statement does NOT describe objectionable current?
• What color pair is typically found in UTP cable for the second wire?
• What is the minimum size EGC when supplying a 3 hp motor from a 1-pole breaker with maximum size nontime-delay fuses?
• In electrical safety standards, who is deemed qualified to perform testing and troubleshooting on circuits?
• The circuit conductors of a DC motor are connected directly to which component?
• What information must motor controllers be marked with?
• How far must propane tanks be refilled from the nearest building?
• What is the minimum depth requirement for burying plate electrodes made of iron or steel?
• For circuits with the highest amperage of 100A, what is a recommended conductor size for grounding?
• In an AC motor, what effect does increasing the frequency have on speed?
• Where must a safety switch be located when considering a motor, starter, and panel that are "within sight" of each other?
• When grounded conductors come into contact with a metal enclosure, what happens?
• In terms of installation, what is crucial when working with fiber optic cables?
• Can construction workers be exposed to hazardous levels of lead during their work?
• When electrical current flows through the brushes of a DC motor, it interacts with which part of the motor?
• Which device could be used as a disconnecting means for a 5 horsepower, 240-volt, single-phase motor?
• Which of the following is NOT a function of an MATV system?
• What does a confined space need to have in order to require a permit?
• Which of the following refers to the properties of a grounding electrode conductor?
• What should be done after an overload relay has tripped?
• What happens if the metal nozzle is not in contact with the vehicle's filler neck during refueling?
• What is discharged into the earth when static electricity is maintained at a gas station?
• Ductwork obstructing a conduit run or junction box is an example of layout ___.
• What acts are considered unsafe and hazardous in electrical practices?
• What is the purpose of wire markers in control circuits?
• A motor branch circuit short-circuit ground-fault protection device primarily protects which component?
• For a feeder supplying multiple motors, what is the minimum size aluminum THWN/THHN conductors permitted?
• A horn is shown at ___ in Figure 320.11 as a NEMA or industry standard symbol.
• What type of diagram provides a clear representation of wiring arrangements and components?
• The installation costs for which type of cable are typically less?
• What is a common preventive measure against heat illness?
• In an electrical control circuit, when is an interval relay typically activated in a sequence?
• Internal drum switch connections are made between terminals 5 and 6 when the switch is in the ___ position.
• Which statement is NOT a requirement for an equipment bonding jumper?
• The output power produced by a motor is measured in which unit?
• In a 3Ø, 4-W supply system delivering 120/208 volts, is there a neutral present?
• ___ is the starting of a motor for short periods of time and is generally used for positioning of a driven load.
• In a building with accumulated combustible materials, how many square feet of protected area requires a fire extinguisher rated not less than 2A?
• CCTV coax cable is constructed with a(n) ___ shield.
• The windings of a 230/460-volt, dual-voltage, wye-wound motor are connected in what configuration when the supply circuit is 480 volts?
• What is a typical application for synchronous clock timers?
• At 11 pm in AUTO mode, which light is energized?
• When terminating UTP cables, the placement order of wires is primarily based on what factor?
• The minimum size of a grounded conductor in a conduit is based on what factors?
• For a 120/240-volt, 1-ph, 3-wire service to a 100-Amp service, what is the smallest neutral conductor that can be installed?
• Referencing Figure 234.411, what is the maximum size circuit breaker allowed for the branch circuit?
• When should emergency action safety planning for a construction job begin?
• What minimum size NM Cable Romex® is required for installation to the designated unit?
• In wiring diagrams, what does a parallel connection imply?
• What state is the green light in fifteen seconds after the switch is closed?
• Typical VDV networks can include which of the following systems?
• What happens if the drinking water container is used for other substances?
• Which of the following is NOT a typical characteristic of grounding conductors?
• The term equipotential plane refers to installations in all of the following except?
• When using metal underground water piping as the only grounding electrode, what additional requirement must be met?
• An AC motor drive is also referred to as a(n) ___ drive.
• According to the NEC®, which section allows for the bonding of normally non-current-carrying metal parts of portable generators to the generator frame?
• Using K=10.86, what size wire is needed for a specified voltage drop of 3% for a motor 160 feet away from a panelboard?
• After how long will the red light turn OFF if it is on after the float switch closes?
• What is the largest permitted breaker that can be installed in the panel for Motor 1?
• What connection type is a 3Ø, 3-W supply system delivering 240 volts?
• What is the minimum size equipment grounding conductor required for a 200 Amp service?
• The minimum size of an equipment grounding conductor for a circuit protected by an automatic overcurrent device rated at 200 amperes should be which size?
• Which principle is primarily demonstrated by the operation of a recycle relay?
• What should be monitored when checking the performance of an electric motor?
• A reduction in energy consumption can also be realized by reducing the speed of electric motors.
• In a circuit with a RECYCLE setting, which operational diagram indicates correct operation?
• What does OSHA provide regarding bloodborne pathogen safety on construction sites?
• What protective measure is commonly required for receptacles in wet locations according to the NEC®?
• What is a key reason for bonding electrical equipment?
• A dot on a ladder diagram indicates what type of connection?
• In a single nonmetallic raceway that contains conductors for circuits rated at 40, 60, and 100 amperes, how large should the aluminum equipment grounding conductor be?
• In a timing relay system, what is the primary function of an Off-delay timer?
• Taking the time to correctly carry out a task helps to avoid what?
• In a scenario with the smallest permitted conductors feeding a 1 hp motor with nontime-delay fuses, what is the minimum size EGC allowed?
• The smallest branch circuit conductors that can be installed between the circuit breaker and the motor for a 120/240-volt, 3Ø, 4-wire panelboard are how many AWG?
• What is the smallest size wire permitted to be used as a system bonding jumper in an 800-A fused safety switch fed from a transformer with four parallel sets of 3/0 AWG wire?
• What is a common characteristic of cables used in CATV and MATV systems?
• According to NFPA 70E, which circuits require testing or troubleshooting by qualified persons?
• What is the minimum size wire required for a 15 hp, three-phase motor with an FLA of 20 amps at 460 volts?
• What does FRAME on a motor nameplate indicate?
• Which type of interference does coaxial cable effectively reduce due to its construction?
• It is the responsibility of the ___ to initiate programs as may be necessary to comply with the OSHA requirements.
• What is the main purpose of bonding in electrical systems?
• What is NOT a characteristic of a grounding system?
• Which of the following is true regarding transformer secondary grounding requirements?
• After completing the termination of a coaxial cable, what should be present between the shielding and the center conductor?
• Article 695 covers the installation of which type of pumps?
• A commonly used type of coaxial cable used for video applications is ___.
• Which type of protection is not included in a contactor?
• Fifteen seconds after closing the control switch, what will the red light indicate if Sw 1 has been closed for 30 minutes?
• Which of the following is true about the use of single-service cups?
• What is a common way to document what was completed during construction on drawings?
• What is the minimum size EGC permitted for a circuit with the smallest conductors and the largest permitted DETD fuses for a 1 hp motor?
• The minimum size circuit conductors for a motor with a supply from a 120/208-V panel is ___ AWG.
• What will the red light be fifteen seconds after Sw 1 is closed?
• Which of the following statements is true regarding personal protective clothing?
• When should utility providers be notified of demolition operations?
• For a motor branch circuit, the Equipment Grounding Conductor (EGC) can be:
• A dual-voltage motor could be which of the following?
• For a 120/240-volt, 1-ph, 3-wire service to a 175-Amp service, what is the smallest grounded conductor that can be installed?
• Under which condition can a non-metallic conduit be used for grounding purposes?
• A static spark results from what types of charges on two surfaces?
• In 2019, how many fatalities were reported on U.S. highways?
• What is the function of a disconnect (or safety switch) in electrical systems?
• Which of the following parameters is typically fixed and not reprogrammed in a motor drive setup?
• During construction, how many foot candles are required in electrical equipment rooms?
• Ground is defined as which of the following?
• Before employees start demolition operations, what must be determined by a competent person's engineering survey?
• Which type of diagram is generally used to illustrate control circuits?
• Generally, how many output contacts do SSRs have?
• Which of the following correctly shows the internal switching diagram for a drum switch?
• Which configuration is NOT a grounding requirement as per NEC® guidelines?
• High current flow compared to normal operation will result in ___.
• Accident frequency on jobsites has been reduced by requiring workers to wear safety colored shirts or vests. Is this statement True or False?
• What is the main purpose of bonding electrical equipment enclosures?
• To size motor overloads for a DC motor, which resource should be consulted?
• Select the NEMA or industry standard symbol for a component illustrated in a wiring diagram.
• A written, documented electrical safety program is ___ than a verbal one.
• Most clothing designed for fashion is not recommended for construction wear because it what?
• An overload occurs when a conductor is operated in what condition?
• An example of intrinsic motivation is:
• In Figure 303.05, the grounded conductor is shown at Point:
• What type of environment can accommodate single-phase AC manual motor switches?
• The conductor shown at Point C is a(n) ___.
• A 240-volt, 3Ø motor requires a starter with how many power poles?
• What is required for the grounding terminal on a wiring device like a receptacle?
• For a 277/480-volt service with a 3-phase main breaker panelboard, what is the minimum size wire needed for the main bonding jumper?
• The construction of a coaxial cable serves to prevent ___.
• What type of switch can be used as the disconnecting means for a 1-phase motor operating at 240 volts?
• Which signs have red as the predominant color in the upper panel?
• Classified hazardous locations include which of the following?
• In terms of electrical safety, why is static control important during the refueling process?
• What type of starter is commonly used to control electrical motors?
• A fault code displayed on a motor drive could indicate a(n) ___.
• In a 277/480-volt panelboard, what is the largest permissible 3-pole circuit breaker for a motor feeder?
• Which part of the NEC covers equipment grounding and equipment grounding conductors?
• Guardrails are installed primarily to achieve which of the following purposes?
• What type of starting mechanism might a shaded-pole motor use?
• Residential audio systems generally utilize ___-ohm speakers.
• From the head-end of a CCTV system, what is installed to uniquely identify each camera?
• In the installation of EMT, the insulated EGC must be bonded to each 4"-Square box. What is the requirement?
• In equipment bonding jumper connections, which option is not permitted according to Section 250.8?
• Where are the system bonding jumper and grounding electrode conductor required to be installed when a transformer feeds a 120/208-volt, 3-phase, 4-wire main breaker panel?
• According to NEC®, what cannot be smaller than the grounding electrode conductor?
• What is required to be installed between the transformer and the service panel for a 480-volt, 3-phase service panel?
• What impact does electrostatic discharge have on electrical equipment?
• Which of the following is a typical application for an MATV system?
• The maximum voltage to ground in a 480-volt, corner-grounded delta system is ___.
• What is the smallest conductor size permitted between the gutter and the switch for a 7.5 hp motor?
• What function does a drum switch primarily serve?
• Fuses with a rating of not greater than how many amperes are permitted in a safety switch for the motor?
• A 3-phase motor with six windings will have how many leads in the terminal box?
• The purpose of a grounding electrode is to enable electrons to flow into the earth during which of the following events?
• Which of the following is not part of the electrical layout planning process?
• In case of a severe heat-related illness, what is the safest method of cooling down a person?
• What is the maximum size GEC required from the service equipment to the rebar in the bottom of the grade beam?
• What is the minimum wire gauge required for a 3 hp, 1Ø motor at 208-V?
• The maximum permitted size for DETD fuses for the feeder is what amperage?
• During extreme heat, which of the following is most important for hydration?
• Stored bricks shall not be stacked more than ___ feet high.
• What is an important characteristic of effective supervision?
• What type of signs should be used to caution against unsafe practices?
• Are connections made to fireproofed structural members required to be accessible?
• When a short circuit occurs in a circuit with loose conduit couplings and connectors, how is the opening time of an OCPD affected?
• Which NEMA symbol corresponds to a fuse?
• The maximum permitted rating for an ITCB for the feeder is what amperage?
• Which materials can be used for a grounding electrode conductor?
• Which of the following can positively affect your driving safety?
• What connects the equipment grounding conductors to the grounded (neutral) conductors?
• What does NEMA stand for?
• Labeling everything and holding regular clean-ups are examples of ___ on a construction site.
• NEMA Design _____ motors are the most commonly used motors.
• What is the NEMA symbol for a normally open flow switch?
• The control relay will energize when the start button is pressed, and will deenergize when the stop button is pressed. Is this statement True or False?
• When running a grounded service conductor in parallel conduits, how is its minimum size determined?
• As the circuit resistance increases, what happens to the operating time of an OCPD?
• Section 250.60 allows the grounding electrode conductor for lightning protection systems to serve as the primary grounding electrode under which condition?
• ___ is the frequent starting and stopping of a motor for short periods of time.
• What does section Y in a typical magnetic starter usually represent?
• Which of the following is not part of allowing team members to take ownership of their work?
• The maximum length limitation for RG-6 cable is how many feet?
• Which type of cable is best suited for long-distance video transmission?
• According to regulations, when using a voltmeter, what would indicate a functioning receptacle?
• The maximum size ITCB permitted to be installed in the panel is what amperage?
• What must be followed to ensure that shaft rotation is correct and that motor-driven equipment is ready to be energized for the first time?
• What is the minimum size GEC permitted from the service equipment to a 1/0 AWG bare copper ground ring?
• Which of the following three-phase electrical distribution systems is grounded?
• What voltage would a meter indicate between two specific points in a circuit with the SBJ installed?
• What type of NEMA enclosure provides a degree of protection against windblown dust?
• For a motor with a supply from a 120/240-V 3-ph panel, the minimum size circuit conductors are ___ AWG.
• When performing certain operations on or near energized equipment or circuits, approved clothing must be worn for protection from electrical arcs. What type of clothing is required?
• What is the minimum size circuit conductor for Motor #1 using Figure 230.271?
• What is the minimum size circuit conductor required for Motor #2 between the panel and the wireway?
• Is the neutral conductor of a portable generator required to be bonded to the frame of the generator?
• Using a voltmeter on an energized receptacle, if the leads are connected between certain points, what voltage would be indicated under normal conditions?
• Does the limited approach boundary (distance from energized parts) vary depending on the voltage?
• What condition describes a situation where a motor is operating normally without excessive load?
• Which table of the NEC® is utilized to size the main bonding jumper?
• When connected to a high-voltage circuit, the line current of a dual-voltage motor is:
• If the timer on an ON-delay relay is not functioning properly, what effect would this have on the circuit?
• What is the result of the control circuit power being OFF?
• What is the purpose of a motor nameplate?
• What is the purpose of heaters installed in motor starters?
• At what height is a guardrail typically required?
• Which component is used to protect against overloads in a motor circuit?
• A mechanical-type timer that changes state when control power is applied and reverts after a preset time is called what?
• Typically, which of the following are classified as Class III hazardous locations?
• What is the minimum required size for the main bonding jumper as specified in the NEC®?
• Are listed splice connectors allowed to be used when extending a grounding electrode conductor?
• One second after the switch is closed, what happens to the green light?
• If the timer is set for 10 seconds, what state will the red light be in five seconds before Sw 1 is closed?
• What is the proper overload size for a 230 Volt, single phase, 3 HP motor rated at 14 Amps with a 40°C temperature rise?
• When setting the FUNCTION SETTING switch on the relay for the scenario, which position should it be set to?
• What is the main purpose of tagging defective equipment?
• What is the minimum height an area must be barricaded when debris is dropped through floors?
• What is the NEMA standard symbol for an SPST NO, single-break switch?
• An audio system network can be utilized to provide what type of service?
• What type of diagram illustrates both the control and power circuits for a 3Ø motor?
• The NEMA or industry standard symbol for a ___ is shown at III in Figure 320.11.
• Which muscles are more likely to be strained and sprained?
• After the control switch has been closed for 7 minutes and is now opened, what will the state of the red light be five seconds after opening?
• What characteristic can cause a confined space to be classified as permit-required?
• What should be done to prevent contamination of drinking water containers?
• When solving voltage drop problems involving motor circuits, what should you not multiply by?
• What are the purposes of a grounding electrode?
• If the leads of a voltmeter placed on Terminals of a switch indicate 0 volts, what does this mean about the status of the switch?
• The minimum size of the single bonding jumper in Section 1 is ___ AWG.
• In terms of motor ratings, what does "SF" stand for?
• How long will the red light stay ON when the float switch closes, as per the provided scenario?
• Which statement is true regarding portable containers used to dispense drinking water?
• Which of the following statements is true about electrical safety?
• The minimum size circuit conductors for a 115/230-V 1Ø 5 hp motor using a 1-pole breaker are what size?
• OSHA defines a competent person as someone who ___.
• If a circuit is installed in EMT and compression fittings are improperly secured, what impact does this have in the event of a ground fault?
• What is a key benefit of using reflective vests on construction sites?
• What is the maximum allowable voltage drop for a motor located 160 feet from the panelboard?
• What effect does increasing the diameter of an equipment grounding conductor typically have?
• What describes the condition of the green light immediately after Sw 1 is opened?
• In an OFF-Delay Relay operation, what happens after S1 is pushed and released?
• If a project safety and health program is found to be effectively implemented, what will the compliance officer do?
• What is the correct way to indicate the proper operation of a load according to the diagrams provided?
• What is one consideration for the installation of Optical Fiber Cable?
• What is the smallest conductor size that can be installed from a 120/240-volt panelboard for a motor feeder?
• What type of motor can be operated from a single-phase AC circuit?
• What would section Z in a typical magnetic starter signify?
• If the nameplate information of a motor is 208V, 3-phase, 15 HP, 42 Amps, and 1.10 Service Factor, what are the necessary new overloads?
• What size aluminum equipment grounding conductor is required for a circuit protected by a 70-ampere fuse?
• What does the NEMA standard symbol for a set of transformer windings show?
• Does OSHA require atmospheric testing for hazardous vapors before entering a confined space?
• What is a requirement for containers used to distribute drinking water on a jobsite?
• When a grounding electrode conductor is installed in a metal raceway, how many ends should be bonded to the raceway?
• Which of the following is considered a basic principle of control circuit wiring?
• The minimum permitted size circuit conductors given specific motor nameplate information must be at least ___ AWG.
• Fault currents need to be managed to avoid what issue?
• Which timers are utilized when multiple fixed-timed outputs alternating from "ON" to "OFF" are needed?
• What is the minimum size of equipment grounding conductor needed if the circuit is protected by a device rated at 150 amperes?
• How should impedance grounded systems be connected to the ground?
• An AC drive controls the torque of an AC motor by varying the ___ applied to the motor.
• The frequent starting and stopping of a motor for short periods of time is ___.
• What is a primary symptom that differentiates heat exhaustion from heat stroke?
• A combination starter acts as what type of equipment in electrical systems?
• Which type of connectors can fiber optic cables be terminated with?
• What is the smallest system bonding jumper you can install in the 300 A panel board?
• What risk do you face when transferring flammable liquids, due to static electricity?
• What is the minimum size of the equipment grounding conductor that can be installed in PVC containing three 500 kcmil conductors for a 350-amp system?
• Mechanical-type off-delay timers keep loads energized for what reason?
• Holding circuits are also known as what?
• After calculating ampacity, where in the NEC should you refer to next?
• To help dissipate the heat generated within an SSR, the relays are mounted ___.
• Can dual-voltage, wye-wound, 9-lead motors be field-connected in delta?
• Which of the following is permitted to serve as an equipment grounding conductor?
• The OSHA section for general safety and health has requirements for many topics. Included among these are requirements for ___.
• What happens to a motor if it continues to attempt to start but is unable to reach the rated speed?
• The smallest branch conductor size that can be used for a motor with the given specifications is ___ AWG.
• The smallest conductors allowed for an outboard motor connected to a 120/240-V supply are how many AWG?
• When installing parking lot luminaires on metal poles, is it required to pull in a separate equipment grounding conductor with the branch circuit?
• What type of containers should be used for handling flammable and combustible liquids?
• The minimum size circuit conductors for a motor supplied at 277/480V can be as small as ___ AWG.
• When does the coil in a magnetic motor starter de-energize?
• What is the approximate efficiency of a 50 HP, 480-volt, 3Ø motor with FLA = 53?
• Which type of motivation is associated with external rewards?
• Friction braking of a motor is normally controlled by a(n) ___.
• Which safety switch must be installed to meet NEC® requirements when there is a full-height wall between a panel and a motor?
• What does HVAC stand for?
• A separately derived AC system does not share which of the following?
• After the neutral leaves a transformer, which of the following can be connected?
• In a ladder diagram, which option illustrates the operation of a recycle relay?
• Which component would you associate with a recycle relay in an automation system?
• The maximum size DETD fuses permitted for a motor nameplate information is what amperage?
• What method can effectively prevent static electricity from being an ignition source?
• When operating at different speeds, a motor may be required to deliver ___ to a driven load.
• The neutral bar in the safety switch should be connected to which component?
• What is the minimum standard size for a main bonding jumper required for a service with two sets of paralleled 750 kcmil conductors?
• To effectively promote team ownership, a supervisor should avoid ___.
• Which component of a motor has built-in protection that resets automatically?
• Under maximum ground-fault current flow conditions, what should an effective equipment grounding system incorporate?
• What must be considered when installing grounding electrode conductors?
• For a motor at 275/480 volts with a current reading of 18 amps, what is the size of the SO cord that must be used?
• When inserting the test leads into the meter for AC voltage measurements, where should the black lead be inserted?
• What is the primary procedure before working on or near electrical equipment?
• On a ladder diagram, how are branch circuit conductors represented?
• For a 1Ø motor supplied by a 120/240-V, 1-ph, panel, the minimum size circuit conductors permitted are how many AWG?
• What are the overall implications of improper connections on the relay?
• Where should spare propane tanks for use in portable heaters or forklifts be stored?
• According to fire safety regulations, how often should firefighting equipment be inspected?
• In a system with a one 5 hp motor and multiple smaller motors, what is the conductor size that ensures proper function?
• What is the first sign of heat stroke?
• What is the primary concern when entering a confined space?
• Static electricity is a hazard commonly found in which scenario?
• Symptoms of heat stroke include ____.
• Nontime-delay fuses installed in a safety switch as a disconnecting means for the motor can have a maximum permitted rating of how many amps?
• What will the red light be five seconds before Sw 1 is closed?
• What is the minimum surface area required for plate electrodes made of iron or steel?
• Which type of overload relay is commonly used in motor starters?
• When using a JCK-70 timer as a one-shot timer, to which setting should the function setting switch be adjusted?
• Why is grounding important in electrical motor circuits?
• What is the minimum size of SO cord for a motor supplied from a 120/240-volt, 3-ph, 4-wire panel based on its nameplate information?
• What is one requirement for the metal points of contact in bonding jumpers?
• When connecting components, what does it mean if they are connected in series?
• An emergency or standby power generator is classified as a separately derived system provided that its neutral is what?
• What terminal should Point N be connected to on the relay socket in a ladder diagram?
• The minimum size circuit conductors for a motor powered by a 2-pole breaker in a 120/208-V, 3-ph panel are what size?
• The motor leads in the terminal box of an AC motor originate at which part?
• The NEMA or industry standard symbol for a motor is typically represented at which location?
• When connecting terminals on a 240/480 to 120/240-volt transformer with one side grounded, which of the following statements is true?
• What is the coil rating on the equipment shown in the reference material?
• Which operation can generate lead dust and fumes?
• True or False: Long-sleeved shirts can provide protection against the sun's rays.
• For a constant horsepower/variable torque (CH/VT) load, an increase in operating speed requires a(n) ___ in torque.
• What type of motor is typically referred to when discussing split-phase motors?
• What does a combination starter comprise?
• Which of the following voltages is typically seen in commercial electrical systems?
• What aspect of the construction site might require an immediate update to the emergency action plan?
• The coil of an EMR performs the same function as ___ of an SSR.
• Cat 3, 5E, and 6 UTP cables contain which of the following?
• Which of the following is true about Class II hazardous locations?
• What color is typically associated with an amber indicator light according to standard abbreviations?
• The maximum length of a flexible cord supplying a 240-volt room air conditioner shall not exceed ___?
• What is the permitted EGC size for a circuit conducting a 1 hp engine with the maximum size DETD fuses installed?
• What part of a metal water pipe entering the building is permitted to serve as part of the grounding electrode?
• In a setup where three 120-volt circuits are GFCI protected, the fewest number of neutrals that can be installed in the conduit is ___.
• At 7 am, when the HOA switch is in the AUTO position, which components are energized?
• What type of assembly includes an electrically held contactor and motor overload protection?
• What does a wiring diagram show?
• What is the primary role of a grounding electrode?
• What is the minimum size SO cord permitted containing conductors for a motor rated at 5 hp and supplied by a 120/208-V, 3-ph, 4-W panel?
• A motor controller enclosure that is subject to occasional prolonged submersion shall be type ___.
• What term describes the turning force exerted on the armature in a motor?
• What transformer secondaries are permitted or required to be grounded?
• Which diagram is correct for the ladder diagram where TR is an ON-Delay relay?
• If a 3-phase motor is connected to power but is not rotating in the desired direction, how can the rotation be changed?
• Does the NEC permit the grounded conductor to be bonded to panelboard D enclosure?
• What emergency telephone numbers must be included in the action plan for a construction job?
• Which of the following options is critical in determining the main bonding jumper size?
• Generally, which type of cable has a higher bandwidth and can transmit larger amounts of data?
• What is a key requirement of maintaining electrical safety in the workplace?
• What type of cables contain stranded conductors?
• What are good wiring practices when wiring a control circuit?
• Under what condition will both the red and green lights be ON?
• Which area may be designated for post-evacuation reassembly in an emergency?
• Single-phase AC motors are commonly available in horsepower ratings of up to what value?
• When are supplemental equipment grounding conductors required according to NEC® 250.118?
• When a 120-volt supply circuit is used, where should the motor leads be connected?
• If a person with a simple broken bone is moved, what could potentially happen?
• Is CO2 dangerous when used in poorly ventilated areas?
• What is the purpose of a starter in motor control?
• Which type of motor can operate on either AC or DC power?
• What does Section 250.24(C) require for the grounded (neutral) conductor?
• After a pre-defined delay with an off-delay relay, what occurs?
• To help prevent overvoltage problems, a varistor is connected between the ___ terminals of an SSR.
• What is the minimum thickness required for a toeboard or bumper at chute openings during demolition?
• What is the NEMA or industry standard symbol used for an NOTC set of timing relay contacts?
• What is the minimum size circuit conductor needed for Motor #4 as indicated in Figure 230.271?
• What state will the green light be in five seconds before Sw 1 is closed if the control switch is open?
• What must occur for the ON-delay relay to activate the timed contacts?
• Which statement is true about coaxial cable?
• What is charging a tank also known as?
• Which scenario is most likely considered a location where a GEC is not subject to physical damage?
• What is the typical function of an on-delay timer?
• Driving speeds should be ___.
• What happens to the impedance of an equipment grounding conductor when its size is increased?
• During periods of ground fault, loose couplings and connectors in metal conduit systems can cause a fire hazard. Is this statement true or false?
• For a load fed with 250 kcmil conductors in parallel conduits from a 500-amp breaker, the smallest equipment grounding conductor permitted in each conduit is?
• Five seconds before the switch is closed, what state is the green light in?
• The maximum size of a 3-pole breaker permitted in a panel is rated at what amperage?
• A heater coil is a sensing device used to monitor the heat ___.
• The smallest feeder conductors permitted to be installed between the 120/240-volt, 3Ø, 4-wire panel and the gutter are what AWG or kcmil size?
• OSHA prohibits backing any equipment that does not have a clear and unobstructed view to the rear. Is this statement True or False?
• In Figure 303.05, the equipment grounding conductor is shown at Point:
• Audio systems can utilize ___ cables.
• CATV coax cable is constructed with a(n) ___ shield.
• Which types of equipment grounding conductors are permitted?
• What is the NEMA or industry standard symbol used for an NCTO set of timing relay contacts?
• The ___ of optical fiber cable reflects the light throughout the length of cable.
• Which NEMA symbol represents the closed overload contacts in a motor starter?
• Which starting current characteristic is associated with NEMA Design C motors?
• In which application would you most likely use a reversing starter?
• What must all portable fire extinguishers have?
• What type of hazard do warning signs aim to address?
• NEC® Articles ___ provide classification and installation standards for the use of electrical equipment in hazardous locations.
• What type of device is used to ensure a steady current flow in a DC motor?
• How is overcurrent protection configured for a Motor Control Center (MCC)?
• A NEMA type 3R enclosure containing a motor starter is permitted to be installed ___.
• How are isolated ground receptacles identified?
• True or False: Correct rotation of a 3-phase motor will always be achieved if AØ is connected to T1, BØ is connected to T2, and CØ is connected to T3.
• Which receptacle-box combination will require a grounding jumper from the receptacle to the box?
• What part of an AC motor is responsible for rotation?
• What is the smallest size equipment grounding conductor permitted to install between the ground bar in the pull box and Load #2 when using three 12 AWG conductors?
• Which of the following is not involved in task planning?
• Which type of coaxial cable has a longer maximum length limitation?
• Wearing which kind of jewelry around energized equipment is considered hazardous?
• If the circuit originates in a 120/240-volt, 3-phase, 4-wire panelboard, how many amps should the motor draw at startup?
• The minimum size circuit conductors for a 208-230/115-V 1Ø 7½ hp motor are how many AWG?
• In a motor circuit, when does a branch circuit draw peak current?
• Which of the following materials are considered ferrous?
• Which organization sets guidelines for occupational safety in relation to bloodborne pathogens?
• At 9 pm, which components are energized when the HOA switch is in the AUTO position?
• If the range setting is 999M, what time setting is needed for a 3 hour delay?
• Which type of materials must be stacked and blocked to prevent spreading or tilting?
• Which of the following is NOT a characteristic of intrinsic motivation?
• What does a variable torque/variable horsepower (VT/VH) load require when the operating speed increases?
• The minimum circuit conductor size in a 120/208-volt 3-phase panel for a given motor is ___ AWG.
• A nonfused safety switch with a voltage rating of 600 volts ___ to be used as a disconnecting means?
• When is a system permitted to be grounded according to NEC® Sections 250.20, 250.21, and 250.22?
• Is a bonding jumper required from the ground bar to a set-screw connector in a specific installation scenario?
• When a ground fault occurs, which of the following affects the OCPD opening time?
• Contacts that are spring-held in an open position are referred to as normally what?
• In a scenario where Sw 1 has been closed for 30 minutes and then the control switch is closed, what will the red light be fifteen seconds after the control switch is closed?
• An off-delay timing relay typically has what number of pins in its base?
• When the start button is pressed and released, which sequence of operations occurs for the given arms M1 and M2?
• What hazardous material may the dust produced during demolition contain, necessitating consideration in PPE requirements?
• Are equipment grounding conductors installed in raceways for isolated ground receptacles required to be continuous?
• What is one of the main purposes of an entry permit for confined spaces?
• What is not included in open-type starters?
• Flammable liquids may only be used when there are no open flames or ignition sources within how many feet?
• Which agency's regulations govern the electrical standards for agricultural buildings?
• What device is responsible for changing the direction of current flow through the armature loop?
• In task planning, the acronym W.I.N. stands for ___.
• The minimum bending radius for fiber optical cable is ___ inches.
• Why is it important to constantly watch for potentially hazardous situations?
• What will be the outcome if the control switch for the relay is kept open after its closure and S1 is activated?
• How many sets of NC contacts are shown in Equipment IV?
• What is the minimum size of each bonding jumper in a section feeding a large hp motor through parallel conduits?
• The industry standard method used to reverse the rotation of a DC motor is to use a reversing starter to change the current flow direction through the ___ winding.
• In a 3-pole, 15-amp circuit breaker to a motor, if 10 AWG conductors are installed due to voltage drop, what is the smallest size equipment grounding conductor that can be used?
• What can be concluded about oversizing a branch circuit for a motor?
• How is fiber optic cable generally impacted by environmental conditions compared to copper cable?
• The largest motor circuit breaker that can be installed in the panel for a given motor is how many amps?
• What is the primary purpose of tagging electrical equipment?
• Which timer type allows a cycling operation from ON to OFF based on fixed intervals?
• Which of the following is classified as a bloodborne pathogen?
• What is the minimum size conductor required for a standard SJ cord connecting a motor rated at 5 hp 208-230/460-V, 3Ø?
• In terms of static electricity, which statement is true?
• What is the minimum size of feeder conductors permitted between the breaker and wireway in a 277/480-volt system?
• The current from which reference is utilized to determine the branch circuit conductor size for a 1Ø motor?
• Merit shop philosophy focuses on ___ as a measurement.
• An optical fiber cable transmits which of the following?
• FLA is an abbreviation for which of the following?
• In NEC® Section 250.20(B)(3), what condition must a three-phase, four-wire delta-connected transformer meet?
• Is it true that OSHA requires an attendant to be stationed outside permitted confined spaces?
• What is required for drinking water on jobsites?
• What is the purpose of a control schematic diagram?
• The LOAD switch on a drive is set to CT for ___-torque loads.
• The secondary of a transformer delivering 12 volts must have one of its conductors grounded when supplied from a ___.
• What can cause impaired driving?
• What aspect does the duty rating of a motor indicate?
• Which abbreviation indicates an amber indicator light?
• Because it provides less signal loss, quad-shield coaxial cable is used for ___ TV signals.
• Which component helps ensure safety during repairs and maintenance of electrical equipment?
• An electrical safety program should include a section on ___.
• Which type of motor is commonly used with reversing starters?
• Which of the following best describes the neutral conductor's role in an electrical circuit?
• Safety programs include provisions for frequent and regular inspections of construction ___. These are performed by competent persons designated by the employers.
• In ladder diagrams for an NCTO set of contacts, which symbol is typically used?
• Which of the following may be damaged or destroyed by electrostatic discharge?
• When M is initially running, what is the result of pushing S2?
• What does PB stand for in control switching terminology?
• Safety training for new employees should include which safety topic?
• What term describes contacts that return to their original state after a force is removed?
• What is the main purpose of warning signs?
• In a control circuit, what is the relationship between wires connected to L2?
• Electric braking is a method of braking in which ___ voltage is applied to the stationary windings of a motor after the normal power has been disconnected.
• The size of bonding jumpers on the line or supply side of service equipment is based on the size of the ___.
• Where installed as overhead conductors outside of a building, AC systems of less than 50 volts should be?
• What dangerous condition is related to working in confined spaces?
• Do drum switches contain overload protection?
• A retentive timer has which characteristic?
• A set of normally open auxiliary contacts attached to a lighting contactor is ___ when the coil is energized.
• On a construction site with overhead cranes, should you avoid walking or working beneath suspended loads?
• Which aspect is not specified by NEC® Section 250.62 for the grounding electrode conductor?
• When the HOA switch is in the AUTO position at 8 am, which components are energized?
• What safety gear is required for working with wet cement in addition to gloves?
• How does grounding prevent an electrical fault?
• For an OFF-Delay Relay, how is the sequence affected after S2 is released?
• In a three-phase motor, the part that field coils interact with is known as?
• Does a 3Ø, 3-W supply system delivering 480 volts have a neutral?
• What form does bloodborne pathogens assume primarily?
• What type of receptacle can replace an existing two-wire nongrounding-type receptacle in a location where a GFCI is required?
• When using a 277/480-volt, 3Ø, 4-wire panelboard, what is the minimum size SO cord for connecting the motor?
• What is typically used as a short-circuit ground-fault protection device for a motor branch circuit?
• What is commonly used to visualize a sequence of operations in relay logic?
• From a grounding bar to bonding bushings, the smallest bonding jumpers to be installed in a 600-amp service are which size AWG?
• Which of the following is a true statement about grounding?
• A UPS contains batteries.
• What is the primary purpose of approved arc-rated clothing?
• What term is synonymous with profit in a business context?
• What type of device is critical for establishing a network?
• Heavier gauge wire is used for the ___ winding in a 1Ø motor.
• Which of the following safety topics are relevant for discussion with new employees?
• Which condition is considered an overcurrent?
• CATV coax cable is terminated with Type ___ connectors.
• What happens to the red light one second after Sw 1 is closed?
• As circuit resistance increases, what happens to the time it takes for an OCPD to operate?
• What does a phase sequence indicator primarily test?
• What is commonly used to display how different parts of a system work together?
• In control logic, how are the sequential actions determined for relays?
• How can you best prevent falls when using a ladder?
• NEMA Design C motors are primarily known for what characteristic regarding starting torque?
• What is the maximum size allowed for DETD fuses installed in a safety switch for a motor circuit?
• The smallest branch circuit conductors that can be installed between a 3-pole circuit breaker and the motor is ___ AWG.
• Should you carry heavy objects while climbing a ladder?
• Using the rule of thumb, about how much locked-rotor current will a 75 hp, 460-volt, three-phase motor draw?
• What does symbol II in the NEMA standards represent?
• Which symbol represents a SPDT single-break switch in the NEMA or industry standard?
• The requirements for most guardrails dictate that the height must be between which two measurements above the elevated floor?
• Does ensuring enough lighting while working help prevent accidents?
• A properly grounded system serves to ___.
• Which item is a common application of lead-based paint?
• Why is it important to lock-out equipment before maintenance?
• When measuring voltage between certain points on an energized receptacle, what would the voltmeter indicate if the leads were connected incorrectly?
• The maximum size circuit breaker permitted for a unit is rated at how many amps?
• For the Siemens relay shown in the ladder diagram, which pin must Point 7 be connected to?
• Which regulations cover materials handling, including storage, use, and disposal?
• Which element is essential for nurturing intrinsic motivation?
• Highway fatalities represent more than ___% of all transportation related fatalities.
• Which voltage systems are classified as solidly grounded?
• How many pins are present in the base of an on-delay timing relay?
• Which of the following materials could be used as the grounding electrode conductor (GEC) from the service equipment to building steel?
• What is the advantage of fiber optic cable compared to copper cable?
• When transferring materials from lifting equipment to an elevated level, guardrails are permitted to be removed.
• For Voice/Data/Video network projects, the electrical contractor should determine what?
• Is a 3Ø, 3-W supply system that delivers 240 volts equipped with a neutral?
• For a 115/230-V 1Ø motor, the smallest branch circuit conductors that can be installed are how many AWG?
• What happens when a 3Ø, 4-W supply system is misconfigured?
• Subpart T of OSHA's standards for construction covers which type of demolition operations?
• What primarily determines the starting current of a motor?
• Heat exhaustion occurs when a person's body cannot keep ____.
• What is the primary purpose of a safety switch in electrical circuits?
• When a branch circuit to an isolated ground receptacle is installed using Schedule 40 PVC, how many grounding conductors are required?
• What is the minimum number of circuits required for convenience receptacles and lighting on temporary construction sites?
• What does a grounding electrode conductor accomplish?
• Which wiring method requires a separate equipment grounding conductor to be run with the circuit conductors?
• Which type of cables are generally preferred for high performance in audio systems?
• How long did it take to build one automobile on the Ford assembly line due to increased productivity?
• For a circuit using the smallest permitted conductors connected to a 2 hp motor with DETD fuses, what is the minimum size EGC required?
• What is the role of a grounding electrode conductor?
• What types of conduits can be used to protect a GEC from physical damage?
• What is the starting current of a typical motor in relation to its Full Load Amperage (FLA)?
• Which of the following is considered a current-carrying conductor?
• Which of the following is NOT a basic component of a control circuit?
• For a 277/480-volt, 3Ø, 4-W service with a maximum unbalanced load of 140 amps, what is the minimum size of the neutral?
• What is the smallest bonding jumper you can run in each of the sections of flexible conduit when feeding a 600-A panel board from a 225 KVA transformer?
• How does the impedance of a 230-volt coil compare to that of a 115-volt coil, given both have 600 VA inrush ratings?
• The conductors at Point D are on the ___ side of the service equipment.
• How does dynamic braking differ from friction braking?
• Which of the diagrams shown is correct for the ladder diagram with TR as an ON-Delay relay?
• Which transformer secondary is required to be grounded?
• Which classes are the most common NEMA motor insulation classes?
• When the control circuit power is on, which motor is energized?
• A 3Ø safety switch that is rated at which voltages can be used as the disconnecting means for a 208-volt, 1Ø motor?
• What action is required if combustible materials accumulate in a building?
• When the monitored material increases above a certain setting, what will happen to the contacts represented by the symbol?
• During installations, what is essential to prevent corrosion in bonding connections?
• What kind of mechanical-type timer provides a single fixed-timed output for a set period of time?
• The largest non-time-delay fuses permitted to be installed in a disconnect switch for a motor is rated at what amperage?
• Which symbol represents a siren when used in a ladder diagram?
• For a 15 HP, 460 volts motor showing an FLA of 18 amps, what is the minimum size SOO cord required?
• Which of the following is a characteristic of B-type motors in the NEMA classification?
• What is the function of inherent motor protection devices?
• At 1 pm, when in AUTO mode, which light is energized?
• The maximum length limitation for RG-59 cable is ___ feet.
• What is the function of the transformer in this circuit?
• When using a 12 AWG wire and 60 amp fuses in a motor branch circuit, what is the largest equipment grounding conductor required by NEC®?
• When using a meter to test voltage on an energized circuit, no part of your body should touch ___.
• What component is normally spring-loaded in a foot switch design?
• Which safety feature helps prevent objects from falling from elevated areas?
• Where the maximum line current of a 3Ø load is 60 amps, what should be the minimum rating of a 3-pole NEMA contactor?
• For a coaxial cable, the ___ serves as a conductor.
• Which of the following could serve as a grounding electrode conductor from service equipment to building steel?
• What is the purpose of the main bonding jumper in an electrical system?
• Which of the following meets the criteria for a Ufer ground?
• Is it advisable to lift and twist your back at the same time?
• A 3Ø, 4-W supply system delivering 277/480 volts has a neutral. Is this statement true or false?
• The smallest circuit conductors that can be installed between the wireway and the safety switch for Motor #1 are how many AWG?
• What is the recommended practice regarding ladder placement?
• Only those employees who are qualified by ___ are permitted to operate equipment or machinery.
• A solidly grounded system is one where one of the current-carrying conductors is intentionally connected to the earth.
• What is the minimum size of a copper bonding jumper connecting from the ground bar to the bushings in a 400-amp service?
• What is a common cause of motor overload?
• Among the terminal box connection drawings shown, which diagram is correctly drawn for a 9-lead, wye-wound, dual-voltage motor connected to low (240V) voltage?
• For what purpose are fall-arrest systems used in storage areas?
• Select the NEMA or industry standard symbol for yellow components in wiring diagrams.
• Audio systems can utilize which type of cables?
• In an audio system, emergency notifications are an example of what type of service?
• NOTC contacts are associated with which type of timing relay?
• According to the NEC, which section allows the equipment grounding conductor to pass through a metal box without being connected?
• Why is a concrete-encased electrode effective?
• What do copper cables primarily transmit?
• A 480-volt motor circuit can be protected with a safety switch that is rated at what maximum volts?
• A(n) ___ circuit allows the operator to start and run a motor for short periods of time without memory.
• OSHA's Construction Focused Inspections Initiative states that the goal of the Focused Inspections is to reduce ___ by concentrating OSHA enforcement on those projects that do not have effective safety and health programs or plans.
• Which braking method provides an electrical means to stop the motor?
• What type of contacts may be added to a contactor when a momentary pushbutton switch is used?
• ___ braking of a motor involves the application of a DC voltage to the windings of an AC motor after AC power is removed.
• Fifteen seconds after the switch is closed, the red light will be in which state?
• Which component in a circuit is typically operated manually?
• What is the purpose of grounding in electrical systems?
• Drum switches are considered to be ___.
• When a control switch opens on a multi-timer relay system, what is the consequence?
• What is the state of the green light one second after Sw 1 is closed?
• When START is pushed and released, what happens first in the circuit with TR as an ON-Delay Relay?
• What significant health risk is associated with sandblasting surfaces that were previously coated with lead-based paint?
• The coils on the reversing starter are rated for ___ volts.
• Which of the following items is essential for electrical safety when working on ladder circuits?
• Which symbol is used to represent the NC contacts in a device?
• After the initiating contact is closed, when does a one-shot relay change state?
• A 3-phase, 15 HP, 230/460-volt motor has a nameplate FLA of 38/19. If operated at 230 volts, what is the current flow in each motor winding?
• What is the correct symbol for a NO-HC limit switch?
• How is the size of a main bonding jumper typically derived according to the NEC®?
• What would a meter indicate in ohms between points B and C in Figure 309.73?
• For the unspecified component's NEMA symbol, what should you determine?
• What type of switch can crowd an electrical circuit when constantly held?
• In Diagram II, how is the load connected with the switches?
• The standard connector used for residential CATV installations is ___.
• In the event of a physical emergency, the action plan should prioritize which of the following?
• How many Americans injure their eyes at work each year, according to Prevent Blindness America?
• Solenoids, relays, starters, and contactors utilize ___ to cause an armature to move.
• When the float switch closes, what will happen to the red light?
• What is a key consideration when bonding a grounding electrode system?
• The DESIGN letter noted on a motor nameplate indicates what characteristic?
• Is it safe to use scaffolding erected by other trades without inspection?
• In terms of safety, what must be considered when wiring control circuits?
• What type of accumulation should storage areas be free from to prevent hazards?
• Which type of signs warn about hazardous conditions that could lead to serious injury or death?
• Is a bonding bushing on the flex connector inside the box required if the 3/4" KO was compromised in a flex lighting tail installation?
• Which of the following characteristics is not required of grounding electrodes according to Article 250?
• What can minimize hazards while working during hours of darkness and low-light conditions?
• When the stop button is pressed, the control relay will ___.
• When a 240-volt motor operates and the conductor connected to L1 contacts the metal enclosure, what causes the 2-pole circuit breaker to trip?
• What aspect is crucial for maintaining team morale?
• In a control circuit, what is the maximum number of pilot device contact sets that can be series-connected?
• Which of the following can impact both intrinsic and extrinsic motivation?
• What is the smallest permitted size system bonding jumper for Panel LK?
• For a single-phase, 240-volt residential air-conditioning unit, the maximum size fuses that can be installed is ___ A?
• For Point L on the ladder diagram, which terminal on the relay socket is correct?
• What is defined as a ground fault?
• According to the NEC®, what defines an effective ground-fault current path?
• The common feature of all jog circuits is that they prevent the ___ from operating.
• The maximum permitted rating of the breaker in a 120/240-volt, 3Ø, 4-wire panel with the smallest permitted feeder conductors is?
• When managing a drive system, which type of load may require reprogramming of the operational parameters?
• Which diagram correctly represents the ladder diagram for an interval relay TR according to common electrical standards?
• Which of the following can diminish intrinsic motivation?
• What must be connected together at the service entrance according to specific NEC sections?
• What must all firefighting equipment be?
• What is commonly not seen in a solidly grounded system?
• What is the significance of maximum safe load limits?
• What type of contact is referred to as the holding contact?
• What will be the status of the red light after Sw 2 has been pushed and released?
• The maximum size DETD fuses permitted to be installed in a safety switch is what value in amperes?
• ___ affect the time required for a motor to come to a stop.
• Which NEC Table is used to size the conductor between the ground bar in a service panel and the metal housing of a 3-phase motor?
• The impedance of an electrical conductor is directly proportional to its length. What happens to the impedance of the ground-fault return path when the length of the equipment grounding conductor decreases?
• For a feeder supplying one 5 hp and three 2 hp motors, what is the minimum size conductor allowed?
• In the case of a "gutter service" installation, is it permissible to install a main bonding jumper in the main-lug-only panelboard?
• What voltage would be indicated on a 4-wire, open delta when measuring between any two ungrounded conductors?
• Which of the following is NOT a type of motor protection?
• When aiming to improve personal productivity, one should do what?
• When running normally, the motor pulls how many amps through each pole of the circuit breaker?
• In electrical wiring, which of the following mediums is typically used for communication and control?
• Which items mentioned require securing in storage areas to prevent accidents?
• The NEMA or industry standard symbol for a light is shown at which location?
• What does the term 'bonding' primarily refer to in electrical work?
• According to the NEC®, how many types of hazardous classifications are there?
• What happens to M1 when PB is released while the control power is ON?
• Which article in the NEC® provides requirements for the installation of refrigeration equipment?
• What should a posted floor plan in a construction job emergency action plan show?
• What is the minimum size circuit conductor for Motor #3 specified between the panel and the wireway?
• What is the permissible minimum gauge for the SO cord connecting a motor rated 15 HP at 230 volts with an FLA of 35 amps?
• Which type of equipment grounding conductor is typically furnished with some types of AC and MC cable to establish an isolated ground?
• Which disconnecting means can be used for a 2 horsepower, 240-volt, single-phase motor?
• What type of component is Equipment I referenced in the material?
• Select the NEMA or industry standard symbol for a momentary switch used to release a door magnet.
• Before resetting an overload relay on a starter, you must ___.
• For the Siemens relay shown in the ladder diagram, which pin must Point 3 be connected to?
• What happens to the lights when the HOA switch is turned to MANUAL?
• A hermetic refrigerant motor-compressor is characterized by which of the following?
• When used for a business facility’s computer network, the MDF may serve which purpose?
• For a 2 hp, 208-V motor circuit that uses DETD fuses, what is the minimum size EGC?
• Which of the following refers to an assembly containing motor control units with a common power bus?
• The key to supervision is the ability to ___.
• Nine-lead 3Ø motors are typically factory connected as which of the following configurations?
• To minimize injury hazards while driving, you should ___.
• What is the overload setting for a motor with a nameplate rating of 480 Volt - 3-phase, 5 HP, and 4 Amps at a 50°C temperature rise?
• Which of the following best describes heat exhaustion?
• The primary purpose of grounding metal equipment to the grounding electrode system is to ___.
• In case of indoor installations, what must be considered regarding the mounting of electrical equipment enclosures?
• Which type of enclosure allows a motor to be used outdoors?
• To ensure safety during demolition, what is one requirement for stairwells in multistory buildings?
• If an equipment grounding conductor is not installed in a conduit with compression fittings and a ground fault occurs, how does this affect fault current and opening time of the overcurrent protective device (OCPD)?
• The significance of engaging in discussions about safety for new employees is to enhance what?
• Which pair in Cat UTP cables has the least amount of twist?
• What does bonding primarily ensure among metal parts in an electrical system?
• All solvent waste, oily rags, and ___ shall be kept in fire-resistant covered containers until removed from the worksite.
• When performing maintenance on control circuits, why is it essential to identify normally closed contacts?
• Which component is NOT activated at 8 am when the HOA switch is in AUTO mode?
• What type of equipment grounding conductor is integrated into some types of AC and MC cable?
• The speed of a single-phase AC motor can be controlled by changing which factors?
• In order to establish an effective ground-fault current path, impedance must be:
• In an ON-delay relay, what is the state of the NO contacts immediately after the coil is energized?
• Why is it important to bond or ground when working around flammable vapors?
• Which connection configuration is less likely to have a neutral in a 3Ø, 3-W system?
• Which of the following describes the four basic switching types for SSRs?
• Which signs have bright orange as the predominant color?
• If PB 1 is pressed and held with the control circuit power ON, which motors are affected?
• When self-grounding 120-volt duplex receptacles are installed in a box set back from a sheetrock wall, does the NEC require the ground to be bonded at the last box?
• When working in battery rooms, you should always work ___.
• Are employers required to visually inspect gas cylinders to ensure they are in safe condition?
• What is the largest permitted breaker that can be installed in the panel for Motor 3?
• Which system is utilized for surveillance and/or recorded documentation?
• Redoing work can potentially cost up to how many times the original estimated time?
• For a 3 hp motor supplied by a 120/240-V, 3-ph, 4-W panel, what minimum size SJ cord is required?
• What is the minimum size required for branch circuit conductors supplied from a 277/480-volt panel for a large motor?
• For bonding conductors, which material is specifically required to be continuous and effectively bonded?
• What is the minimum size EGC permitted when using nontime-delay fuses for a 1 hp motor fed from a 120/240-V panel?
• What is the primary purpose of using a magnetic starter in a motor circuit?
• What is the minimum number of heaters required for a NEMA starter as per NEC for a specified motor circuit?
• The wire colors used in 4-pair UTP cables are ___.
• Managing resources and ___ should be taken into consideration when motivating a team.
• Which of the following types of clothing is acceptable on a construction site?
• Which of these symbols is not recognized as a standard NEMA symbol?
• Although most motor drive parameters are factory programmed, motor ___ is a parameter that has to be reprogrammed for the specific installation.
• What indication does a clamp-on ammeter provide?
• OSHA standards require that electrical equipment be ___ before it is serviced or repaired.
• What diagram reading method emphasizes directionality in electrical components?
• What does continuity in an effective ground-fault current path ensure?
• What is a key characteristic of an on-delay relay?
• The NEMA or industry standard symbol I represents which component when used in a ladder diagram?
• When transferring flammable liquids, how must containers be positioned?
• What situation can be dangerous when working around concrete mixer trucks?
• What color should directional signs, other than automotive traffic signs, be?
• According to NEMA standards, what does the symbol for a normally closed contact indicate?
• Can employees consume food or beverages in exposed areas to toxic materials?
• For a universal motor, what is a key characteristic?
• What is the minimum size EGC permitted for a 1 hp motor circuit when the maximum permitted rating of ITCB is installed?
• How many conductive materials are typically involved in a static spark occurrence?
• Under what conditions can food and beverages be consumed on site?
• Which diagram in the electrical schematics represents the operation of an interval relay?
• What is required for an effective ground fault current path?
• What does symbol I represent in the NEMA standard?
• It is crucial that new employees are advised of what before starting their tasks?
• Who is responsible for the development of a fire protection program during construction and demolition work?
• Grounding electrodes for lightning protection should be connected to grounding electrodes for the electric power and communications systems. What is the guideline?
• During demolition operations, openings in floors require barricades to be placed at a minimum height and distance from the edge. How far back must these barricades be from the edge of the holes?
• The "M" in the goal-setting acronym S.M.A.R.T. stands for ___.
• What is the classification for two or more grounded electrodes that are bonded together?
• The time delay period for which type of timer is determined by the speed of air or liquid passing through an orifice?
• Which of the following tables is used to select a supply-side equipment bonding jumper?
• What is the maximum size inverse time circuit breaker permitted for a single-phase, 7.5 hp motor operating at 208 volts?
• To comply with safety regulations, how should the water dispensing tap be configured?
• Drum switches have a center off position.
• Which of the following is a component of an emergency action plan for a construction job?
• What is the primary function of overload protectors installed in a motor starter?
• Which of the following methods is NOT acceptable for making equipment bonding jumper connections?
• Which component is essential for absorbing external shocks to fiber optic cables?
• The largest circuit breaker that can be installed according to one of the nameplates is ___ A?
• For an 11-pin off-delay timing relay, what happens when the external switch is opened?
• What are the four basic timing functions available on solid-state timers?
• After connecting a dual-voltage motor to a high-voltage circuit, the current through each motor winding:
• In a 277/480-volt 3-ph system, the minimum size branch circuit conductors needed for the motor are ___ AWG.
• Which pushbutton operator is best suited for an emergency shutdown located next to a principal exit door?
• If Sw 1 has been closed for 30 minutes, what will the green light show five seconds after the control switch is closed?
• Motivation for a task can be:
• A 3Ø safety switch rated at 600 volts can be used as the disconnecting means for which of the following motors?
• Which of the following is a braking method used for a motor?
• The training provided to new employees about safety issues is designed to help them with what?
• When the start button is pressed, the control relay will ___.
• What is the minimum size STO cord for a motor supplied from a 120/240-volt, 3Ø, 4-wire panelboard?
• What is the smallest system bonding jumper you can install in the 600-A panel board when using a 500 KVA transformer?
• What is the minimum AWG size for an impedance grounding conductor made of aluminum?
• All motor circuits require ___ protection.
• Many job specifications require phase-reversal protection for three-phase motors operating ___.
• What is a graphic element that represents a quantity or unit in electrical diagrams?
• How many different types of conduits are generally accepted for protecting ground electrode conductors?
• What is the maximum size nontime-delay fuses permitted when a safety switch is installed adjacent to a motor?
• Conductive jewelry is considered an electrical hazard around what?
• If a separate equipment grounding conductor is added, what is its role in relation to the raceway system?
• Select the NEMA or industry standard symbol for a component represented in a wiring diagram.
• Which of the following operations accurately describes an OFF-Delay Relay situation?
• Which of the following is NOT a type of single-phase AC motor?
• A 3Ø, 4-W supply system delivering 277/480 volts is what type of connection?
• What is the maximum size for a 2-pole circuit breaker that can be installed in a 120/240-volt, 3Ø panelboard for a specific motor?
• In what situation should workers exercise caution around concrete mixer trucks?
• When grounding electrode conductors are installed in metal conduit for physical protection, what must the conduit be?
• Battery rooms require adequate ventilation to remove gasses.
• Which of the following can cause a structure to be shored and braced before demolition?
• An AC drive controls the rotational speed of an AC motor by varying the ___ applied to the motor.
• What happens to M after S1 is pushed and released on an OFF-Delay Relay?
• For a single-pole breaker in a 120/240-V panel supplying a 1 hp motor, what is the minimum size EGC if the largest permitted DETD fuses are used?
• Which of the following is a requirement for UTP cable termination?
• What is the required function of a motor branch circuit short-circuit ground-fault protection device?
• What type of hold does a contactor have when it closes with power applied to the coil and releases when power is removed?
• When equipment enclosures and raceways are bonded, what is satisfied?
• The purpose of a toeboard surrounding an elevated platform is to prevent what?
• What type of motor is a shunt DC motor classified as?
• According to Table 250.66, an aluminum grounding electrode conductor can be used with what type of service-entrance conductors?
• In connecting a motor with a 120/240V supply using a single breaker, the minimum SJ cord size cannot be less than which gauge?
• Using the rule-of-thumb method, if a motor nameplate shows 54 full-load amps, what is the locked rotor current?
• Which signs are used to alert individuals to high voltage warnings that can cause serious injury or death?
• Which motor type requires commutation for efficient operation?
• Which of these requires a 911 call for immediate medical attention?
• What type of signs are used to warn against potential hazards or unsafe practices?
• What defines a conductor that is not intended to carry current during normal operation?
• OSHA's Focus Four program focuses on four types of accidents that cause over 50% of serious what?
• In what position is the HOA switch for the lights to be energized?
• Motor drives provide energy savings when used with ___ and loads.
• What is a primary responsibility of a competent person on a job site?
• Which requirement is not specified by Section 250.24 for the main bonding jumper?
• In what position should the bonding connection be made when installing a GEC in a raceway?
• Overexposure to lead can cause damage to which part of the body if ingested or inhaled?
• Which of the following is a characteristic of a grounded AC system?
• What is the minimum size EGC permitted for a 2 hp, 115/230-V motor fed from a 120/208-V panel where DETD fuses are installed?
• What is the correct installation method for a new clothes dryer in an older home with a jumper between the neutral and ground terminals?
• Compared to crimp-on BNC coaxial cable connectors, screw-on BNC connectors permit a ___ signal loss.
• Writing down task lists increases memory retention to ___.
• Inherent motor protection devices are built into the motor and reset how?
• Optical fiber cable can be installed in which of the following ways?
• What happens to the grounding effectiveness when the grounding conductor is too long?
• In a corner-grounded delta system, the voltage potential to the ground is considered safe up to ___ volts.
• The motor winding leads in Drawing ____ are correctly numbered. Which drawing is accurate?
• What is a significant concern regarding the use of soft solder in construction?
• The correct minimum size for branch circuits from a 3-pole breaker for a specific motor setup is ___ AWG.
• What protective gear should be worn when working with wet cement products?
• What is the main hazard associated with allowing wet concrete to touch the skin?
• When dumping demolition material into a chute, what is the minimum height of the toeboard or bumper that must be provided at each chute opening?
• What is the outcome of improper grounding of electrical systems?
• If employees are required to handle or use ___, they shall be trained regarding the safe handling and use of these.
• When the control circuit power is turned ON, are M1 and M2 energized?
• Which of the following is not considered a short circuit?
• What type of equipment is commonly used to detect and minimize hazards on construction sites?
• When must changes be made to construction site emergency action plans?
• Which type of paint is known for inhibiting rust and corrosion of iron and steel, and is still used in various structures?
• Class I hazardous locations are made hazardous by the presence of which factor?
• What should be done if a fire extinguisher is found to be inoperable during inspection?
• According to the NEC®, which section states that no overcurrent device shall be connected in series with any conductor that is intentionally grounded?
• What state will the green light be in fifteen seconds after the control switch is opened, following a 7-minute closure?
• Contractors cannot require any employee to work in any working conditions that are ___ and could affect their health or safety.
• Which statement is true about the operation of an ON-delay timer contacts?
• Under maximum ground-fault current flow, an effective equipment grounding system should maintain which of the following?
• A 3-pole, 250-volt safety switch can be used as the disconnecting means for which motor circuit?
• In which locations are the system bonding jumper and grounding electrode conductor permitted to be installed when a transformer feeds a fused safety switch and main-lug only panel?
• What does OSHA stand for?
• Which device converts electrical energy into a linear force?
• Prior to reconnecting a 3-phase service drop or lateral, what should be verified at the service equipment terminals?
• What is the minimum size of the equipment grounding conductor between the panel and the pull box?
• Accident prevention tags are meant to warn employees of which type of hazard?
• From a 120/240-volt, 3Ø, 4-wire panelboard, the maximum size motor branch circuit time-delay fuses allowed is:
• Which part of a three-phase motor remains stationary?
• What resistance measurement would you expect between leads 1 and 9 for a certain motor?
• The maximum channel length limitation for UTP cable is ___ feet.
• Protective clothing should ideally be designed with what in mind?
• Why is it crucial to understand the nature of static electricity in the electrical field?
• In a 2-wire control circuit, the grounded conductor (neutral) is permitted to be connected to which line?
• What size conductor is required in each conduit feeding a 600-A panel from a transformer in the given scenario?
• What type of torque is required to bring a load up to its rated speed?
• What is the standard color of an equipment grounding conductor?
• In a branch circuit supplied from a 120/240-volt, 3Ø, 4-wire panelboard, what is the minimum size SO cord needed for a motor connection?
• Which control circuit function will activate an alarm only after a vacuum pump has operated for 60 seconds?
• Each motor used in a continuous-duty application and rated more than how many horsepower shall be protected against overload?
• Is it true that one of the two 120-volt wires supplied by a 277-volt circuit must be grounded according to the NEC®?
• Select the NEMA or industry standard symbol associated with a specific component shown in a wiring diagram.
• What is a benefit of single-mode step index fiber compared to multi-mode fiber?
• In a holding circuit, how are the contactor or relay arranged with the stop button?
• What type of wire splice is permitted to be used to connect a grounding electrode conductor that is too short?
• Which of the following does not increase productivity on a jobsite?
• What is the primary purpose of a barricade?
• What is the efficiency of a 10 hp DC motor that draws 31 amps at 300 volts?
• What is the role of a GFCI in a 120-volt receptacle circuit?
• For a 125 hp motor supplied by a 120/240 V panel, what is the minimum size of conductors that are required?
• When using an ohmmeter between terminals 95 and 96, what reading is expected?
• Contacts that are spring-held in a closed position are referred to as?
• Which type of relay maintains their control circuits and status even if the control power is dropped?
• Which component is used when an output is required for periodic intervals in electrical control systems?
• Which of the following grounding electrode conductors (GECs) requires protection when not subject to physical damage?
• Which type of signs are mandated where an immediate hazard exists?
• What is the maximum size fuses that can be installed for a single-phase compressor with an RLC of 28.9 amps?
• What is an acceptable method to guard protruding rebar?
• The "R" in the goal-setting acronym S.M.A.R.T. stands for ___.
• What is the minimum size EGC allowed for a 3 hp motor when a 120/240-V panel is used with the minimum circuit conductors?
• Brushes in a DC motor are typically made of which material?
• What minimum size conductors are required to connect a 75 hp motor to a 400-amp feeder with 600 kcmil copper wire?
• What is the main role of a motor overload protection device?
• Why should the fuel tank not be overfilled during refueling?
• Immediately after being turned off, ___ braking of a motor involves the reconnection of the motor to act as a generator.
• A motor with a nameplate rating of 208V, 3-phase, 15 HP, 42 Amps, and a 1.15 Service Factor requires new overloads. What should the rating be?
• What would a meter indicate in volts between points A and B with the SBJ installed in the panel?
• An 80-amp feeder is installed to supply power to an agricultural barn. The feeder conductors are 4 AWG. What is the required gauge of the EGC?
• One of the most important goals of the Multi-Employer Worksite Policy from OSHA is to ensure that ___.
• What is the acceptable method for splicing a short wire to a grounding electrode conductor?
• What should you do if you notice a coworker engaging in unsafe practices?
• In an agricultural building, where a separate equipment grounding conductor is not part of a listed cable assembly and is installed underground, it shall be?
• The equipment grounding conductor should be sized based on which of the following?
• In goal setting, making objectives measurable ensures ___.
• What conductor size is required for connecting a motor feeder in a three-phase 240-volt system?
• What is the minimum size circuit conductor required for Motor #2 using Figure 230.271?
• What should overload sizing for a horsepower-rated motor be based on when operating at a specified voltage?
• What type of switch is depicted by the NEMA symbol at location II?
• A project not eligible for a Focused Inspection will receive a comprehensive inspection to identify what?
• Whenever materials are dropped more than 20 feet to any point lying outside the exterior walls of the building, a(n) ___ is required.
• Employees who use or are exposed to hazardous materials must receive ___.
• When a ground fault occurs in a circuit with loose conduit couplings, the opening time of an Overcurrent Protection Device (OCPD) is affected. Is this true or false?
• A 3Ø safety switch that is rated at 250 volts can be used for a ___ motor.
• Is it permissible to drive a ground rod at the base of a metal sign instead of installing a grounding conductor with the circuit conductors?
• What role does inertia play in motor control?
• The minimum size bonding jumper for each FMC between a transformer and Panel LK is what size AWG?
• After a dual-voltage motor is reconnected from a low-voltage circuit to a high-voltage circuit, the line current:
• The core of optical fiber cable is covered with ___.
• What performance advantage do Cat 5E and 6 cables have due to their twist consistency?
• What distinguishes a solid-state timer from a mechanical timer?
• What safety measure should be taken when transporting flammable liquids in vehicles?
• What type of diagrams are generally used to illustrate control circuits?
• When coil voltage is applied to a solid-state interval relay, the contacts change state when?
• ___ is indicated on a clamp-on ammeter when placed within the magnetic field produced around a single conductor.
• Do moving equipment on construction sites create extreme hazards that require constant caution?
• What is the function of a GFCI?
• Which of the following is a requirement for proper grounding and bonding in electrical installations?
• Why were underground steel or copper water piping systems traditionally used for grounding electrodes?
• When the SBJ is removed from the panel, what would a meter indicate in volts between points B and C?
• In VDV networks, what is commonly used for video transmission?
• A 3-phase, 10 hp, 230/460-volt, design B motor has a nameplate FLA = 26/13. When operated at 230 volts, what is the approximate starting current (LRC) in amps?
• Can a grounding electrode conductor be smaller than the main bonding jumper?
• What occurs after the coil of an on-delay timing relay is energized for a pre-programmed period of time?
• For a motor with a circuit line voltage of 480, the largest DETD fuses that can be installed in its safety switch are rated at:
• What type of cap is considered acceptable to guard sharp ends of rebar?
• What is a primary component of a single-phase AC motor?
• Which type of cable will not pick up electric noise or generate electromagnetic radiation that may interfere with other signals?
• Which bloodborne pathogen is known for being the most infectious?
• Which of the following must employees know as part of the emergency action plan?
• How can drinking water be dispensed from portable containers on a jobsite?
• Which conductor is used to connect the equipment grounding conductor at the service facility?
• When trying to start with 3Ø power, how many amps will this motor pull based on its Code Letter and nameplate voltage?
• Which of the following is not a step in task planning?
• EMR stands for which of the following?
• A 10°C increase in the operating temperature can decrease a DC motor's life expectancy by what percentage?
• Which component is usually illustrated with the NEMA symbol IV?
• The largest permissible DETD fuse size with a line voltage of 480 volts would be?
• What is the maximum size of the 3-pole circuit breaker allowed in a 120/240-volt panelboard for a motor feeder?
• If Sw 1 has been closed for 30 minutes, what state will the red light be in five seconds after the control switch is closed?
• A DC drive controls the ___ of a DC motor by varying the current applied to the armature.
• For a motor rated at 480 Volt - 3-phase, 5 HP, and 4 Amps with a 40°C temperature rise, what should be the overload size?
• What is the purpose of the bonding wire inside the dispenser hose at gas stations?
• What is a common service factor for single-phase AC motors?
• A 25 hp motor has a nameplate SF = 1.10 and FLA = 60. Without damage, what is the maximum current in amps this motor can pull for a short period of time at rated voltage?
• Are high-impedance grounded neutral systems allowed to serve 277-volt loads?
• An individual disconnecting means shall be provided for each controller and shall disconnect the controller. Where should the disconnecting means be located?
• The primary function of a block diagram is to show what?
• In the event of a fire during construction, which document should be referenced for emergency procedures?
• What is the minimum permissible size for conductors when connecting multiple three-phase motors?
• When the control relay is energized, the normally open contact will close allowing it to stay energized until ___.
• An AC motor operates by changing the direction of current through which component?
• What happens to the red light five seconds after the control switch is opened?
• What type of meter display is referred to in the context of Figure 319.204?
• When installing coaxial cable, how many end(s) should be labeled?
• What happens to the coils contained within solenoids, relays, starters, and contactors when they fail?
• The fewest number of heaters required in a starter is ___.
• NEC® Section 250.20 Informational Note refers to a corner-grounded delta transformer diagram. Which figure is it shown in?
• If a hazardous situation cannot be fixed by yourself, what should you do?
• When is it acceptable to use the rebar in concrete as a grounding electrode?
• Which tool is used to measure resistance in electrical circuits?
• The "S" in the goal-setting acronym S.M.A.R.T. stands for ___.
• Under which condition can 4 AWG and larger conductors of a basic color other than green be used as an equipment grounding conductor?
• Why are guardrails important in a work environment?
• What is the purpose of testing GFCI receptacles?
• Dual-voltage 3-phase motors have ___ windings per phase.
• What is the purpose of securing stored materials in tiers?
• Which scenario does not indicate intrinsic motivation?
• What should be done to walls or floors that have been damaged before demolition work starts?
• Can a double-pole, single-throw switch rated for 250 volts AC be used as a disconnect for a 1.5 HP, 230-volt motor?
• When connecting a feeder to a 460-volt motor, what should the conductor gauge be to ensure compliance?
• How far must the ground clamp be from the earth for an aluminum grounding electrode conductor?
• During vehicle refueling, which factor is controlled by maintaining metal contact between the nozzle and filler neck?
• Five seconds after Sw 1 is opened, what will the green light be when Sw 1 was previously closed for 40 seconds?
• Standardized symbols used in wiring diagrams are categorized under which organization?
• What is the smallest conductor size permitted between Panel LC and the gutter without considering future motors?
• In an electrical holding circuit, what type of contact is added to maintain power without holding a pushbutton?
• Before using scaffolding constructed by other trades, what is necessary?
• What is one of the main purposes of concrete in construction?
• A(n) ___ is used to ensure that a motor rotates in the correct direction when connected to a circuit.
• All materials stored in tiers must be secured to prevent what?
• Synchronous clock timers are characterized as being what?
• Which condition will enhance the performance of an equipment grounding system?
• When connecting a 3-phase service, what is the consideration for sizing the equipment grounding conductor?
• Are walkways formed from heavy planking required for employees during manual demolition?
• Point M on the ladder diagram should be connected at terminal ___ on the relay socket.
• What should be done with scrap lumber, waste material, and rubbish in the work area?
• Symbol II in a specific diagram represents a switch with what kind of contacts?
• In a control circuit, which drawing indicates the maximum number of control relay coils that can be connected line-to-line in parallel?
• The maximum rating for non-time-delay fuses in a specific motor disconnect switch is?
• A motor will draw ___ than its rated nameplate current when heavily loaded.
• Which component primarily contributes to the timing aspect of a dashpot timer?
• In an educational context, which motivation is encouraged to promote a love for learning?
• The minimum size circuit conductors permitted for a 115/230-V 1Ø 3 hp motor are how many AWG?
• A flow switch detects the movement of which of the following?
• Which of the following items can be considered sharp surfaces that may carry bloodborne pathogens?
• Why is it important to determine the types of emergencies that may be encountered in the emergency action plan?
• Which NEMA symbol represents a magnetic overload relay?
• What does operational diagram III indicate when the setting is ONE SHOT?
• When the EMT is used as the equipment grounding conductor (EGC) for a circuit, what is the effect on the opening time of the circuit breaker protecting the circuit?
• Discussing safety issues and completing training helps new employees achieve what?
• What type of access is permitted to be used during demolition operations?
• Which method is used to terminate coaxial cable?
• DC motors manufactured in the United States are generally rated in what unit?
• What are the types of DC motors available?
• Which body fluids are considered potentially infectious?
• Identify the NEMA standard symbol for an SPST NC, single-break switch.
• Which signs have yellow as the predominant color?
• Warning signs often indicate potential hazards that could lead to what?
• What can happen if the selected protective device is rated too high for a motor?
• For a variable torque/variable horsepower (VT/VH) load, an increase in operating speed requires an increase in ___.
• In what units can AC motors be rated?
• Debris dropped through holes in floors requires barricades to be placed at what height above the working level?
• The conductors at Point C are on the ___ side of the service equipment.
• What is the purpose of using an inverter in motor control applications?
• What does an industrial pushbutton consist of?
• Symptoms of heat exhaustion include ____.
• Under which condition is a portable generator not required to be connected to a grounding electrode conductor?
• If a motor is connected to a 230-volt circuit, how does the branch circuit current compare to a 115-volt circuit?
• What type of motivation is driven by internal values and desires?
• If a motor has field leads marked F1 and F2, what type of motor is it?
• Employees working in tanks and similar storage areas must be equipped with what kind of equipment?
• What role does relay R1 serve in the system when the HOA switch is in the AUTO position?
• In a three-phase, four-wire system, what role does the neutral play?
• Which organization provides standards for the construction of motors and electrical equipment?
• Is it safe to refuel vehicles near welding operations?
• What is one of the primary roles of the electrical contractor in Voice/Data/Video projects?
• What color is the second grounding conductor in Type MC cable?
• How is the equipment grounding conductor related to other conductors in a circuit?
• The requirement to ground equipment fastened in place exempts which of the following?
• For a three-phase motor with a 30-A, 3-pole circuit breaker, what is the minimum size of the equipment grounding conductor required?
• The entire surface of rubber insulating gloves must be field tested before each use. What does this testing involve?
• What type of conductor is often used for establishing isolated grounds in AC and MC cables?
• Which of the following is an example of a manually operated component in a control circuit?
• A ___ is commonly used in a holding circuit and is known as a holding contact.
• The part of a typical Cutler-Hammer starter shown within section X is referred to as what?
• What should you use to select the size of motor branch circuit conductors based on voltage drop?
• When equipment enclosures and raceways are bonded, the intent of the definition of Effective Ground-Fault Current Path is satisfied.
• The smallest branch circuit conductors that can be used for a 1-pole circuit breaker in a 120/240-volt panelboard are how many AWG?
• What is the minimum length required for a ground ring?
• Select the NEMA or industry standard symbol for a component denoted in a wiring diagram.
• What color is predominantly used in danger signs where an immediate hazard exists?
• What type of relay is used where the state changes after a specific time period?
• Although a phase failure relay would be the optimal choice to protect a motor from overheating when a phase failure occurs, some motors have some protection provided by ___.
• Before entering a confined space, what is required by the employer?
• Which of the following is not considered an additional time loss due to rework?
• What is required for grounding conductors used in hazardous locations?
• The maximum voltage to ground in a 277/480-volt, 3-phase, 4-wire system is ___.
• What terminal should Point G on the ladder diagram connect at on the relay socket?
• What state is the red light in five seconds before Sw 1 is closed?
• Which symbol represents the NEMA or industry standard symbol for a fuse?
• "Slow is smooth and smooth is fast" illustrates the importance of what approach in tasks?
• What is the minimum conductor size for a motor having a 75 hp rating in a 277/480-V setup?
• What is a key consideration when selecting a motor starter for a 3-phase motor?
• The four types of accidents included in OSHA's Focus Four program are accidents involving ___.
• For general-purpose relays, how does the contact current rating for switching DC compare to that of AC?
• SSR is the abbreviation for what term?
• What percentage of workplace eye injuries can be prevented by using proper safety eyewear?
• In a ladder diagram, terminal 3 on the relay socket is connected to which point?
• As the current through a relay coil increases, the magnetic field around the coil ___.
• In the context of bonding jumpers, what is the significance of using conductors of a specific size?
• What is the primary function of the shielding in coaxial cable?
• What is an effective strategy for acclimating to high heat environments?
• What is the key purpose of equipotential planes in electrical installations?
• The primary purpose of ladder diagrams is to represent what type of systems?
• When symptoms of heat illness are noticed, what should be the first action taken?
• The largest fuse that can be installed in a fused safety switch is ___ A?
• Cat 3, 5E, and 6 UTP cables used for LANs generally contain what type of conductors?
• For a motor rated 30 hp, what is the recommended conductor size permitted for operation?
• Which type of grounding conductor is considered most effective for minimizing electrical hazards?
• Current flow can be defined as:
• The minimum size of each of the copper conductors connected between the ground bar and each service pipe is ___ AWG.
• How many pins are on the base of a one-shot timing relay?
• In a 1600-ampere, 3-phase service with five parallel sets of 500 kcmil conductors, what is the minimum size for the main bonding jumper?
• What rating must at least one portable fire extinguisher have when located outside a room storing more than 60 gallons of flammable liquids?
• The DETD fuses installed in a safety switch supplied with 120/240-volt, 3Ø, 4-wire power can have a maximum rating of what amps?
• Which type of hazardous locations includes environments with the potential for explosions due to flammable gases?
• For a motor on a 120/240-volt, 3Ø, 4-wire panelboard, what size SO cord is considered minimum for flexible connections?
• What is the minimum size EGC permitted for a 115/230-V, 3 hp motor with a 1-pole breaker in a 120/240-V panel?
• Danger signs are primarily designed to indicate what?
• Which of the following is a safety requirement when servicing electrical equipment?
• How often should GFCI receptacles be tested for proper function?
• What type of communication do audio systems primarily support?
• An arc flash is defined as what?
• What terminal on the relay socket should Point K be connected to in a ladder diagram?
• Phase unbalance in a three-phase system causes ___.
• Ground-fault circuit interrupters are designed to trip at current levels above:
• When using a power tool with auxiliary handles, what must you do?
• ___ can be used as termination points for UTP cables.
• What is the minimum size conductors permitted in the SJO cord used to connect a 1½ hp motor?
• Which method is commonly used to adjust the torque of an AC motor?
• A motor rated at 208 V, 3-phase, 15 HP, and 42 Amps requires new overloads due to insufficient initial ratings. What should be the new overload rating?
• For a 3-horsepower motor, what is the minimum conductor size allowed in a 120/208-V 3-ph system?
• How many sets of overload contacts does the equipment shown have?
• New employees must be informed of what regarding PPE?
• Is Type MC cable containing an insulated EGC permitted to be used within patient care areas?
• Where should the grounding impedance device be installed?
• In which systems is an equipment grounding conductor always required to be installed within the raceway(s)?
• What is the minimum size circuit conductor for Motor #1 between the panel and the wireway?
• Is the grounded circuit conductor always considered the neutral?
• When is it permissible to work on energized electrical equipment?
• Which of the following is NOT typically included in an OSHA safety program?
• For a 3-phase load connected to a 600-A circuit breaker with three 350 kcmil conductors in each run of RMC, what is the smallest equipment grounding conductor that can be installed in the conduit?
• For concrete metallic reinforcing bar (rebar) to be used as a grounding electrode, which condition is NOT necessary?
• Which is critical for new employees regarding PPE?
• If a motor's full-load current is known, what percentage can be used to determine the maximum branch circuit size?
• When the abatement is observed by OSHA's CSHO, other-than-serious hazards that are immediately abated ___ be normally cited.
• When considering overload protection, which of the following is crucial?
• What happens during a short-circuit condition in a motor circuit?
• If a secondary conductor of a transformer is linked to a grounding electrode, what happens to the fused conductors?
• In Diagram II, when is the load energized?
• When a separate equipment grounding conductor is installed in a metal raceway, how does it relate to the raceway?
• When someone is seriously injured and bleeding, what should be the immediate course of action?
• Which of the following indicates a light source according to NEMA symbols?
• What happens to the fault current when a grounding connection is not properly secured?
• A NEMA Type ___ enclosure provides a degree of protection against windblown dust.
• When installing coaxial cable, the tension applied when pulling cannot exceed how many pounds?
• What is the minimum required size of the neutral in each conduit if the supplied loads will not exceed 310 amps?
• Which type of motor is known for high efficiency in converting electrical energy into mechanical work?
• A non-permit confined space does not contain any hazard capable of causing what?
• Which contact is commonly referred to as the overload contact?
• When is extrinsic motivation typically used?
• Which device could be used as a disconnecting means for a 2 horsepower, 240-volt, single-phase motor?
• Which of these fiber optical cables can transmit light the greatest distance?
• When near moving equipment, can you safely assume the operator is aware of your presence?
• The smallest circuit conductors permitted in scenario 230.27 are what size in AWG?
• What is the required identification for a main bonding jumper with only a screw as specified by the NEC®?
• How were line diagrams designed to be read?
• For a 240-volt single-phase motor, how many power poles are needed in its starter?
• What is an example of negative extrinsic motivation?
• The NEMA or industry standard symbol for a double-break, momentary-contact, single-circuit, normally open pushbutton switch is shown at which location?
• For a single-phase 3 hp motor operating at 460 volts, what is the NEC® table FLC rating in amps?
• Which types of relays change state immediately when the initiating contact is closed?
• From a 480/277-volt, 3Ø, 4-wire panelboard, the maximum size DETD fuses that can be used on the motor branch circuit is:
• What key factors must be present in an effective ground-fault current path?
• OSHA's CSHO will interview employees on a project to determine their ___.
• Are vehicle-mounted generators always required to be connected to a grounding electrode?
• Is Electrical Nonmetallic Tubing permitted to protect a grounding electrode conductor from physical damage?
• What is the standard color code for a grounded conductor in electrical installations?
• What should you do if you encounter waste material during your work?
• Small drives controlling 3Ø motors can be supplied with ___ power.
• A three-phase, four-wire, wye-connected system is typically grounded at which point?
• What resistance reading would you expect between two points in a circuit when there is an open circuit?
• The requirements of NEC® Section 547.44 apply to which of the following?
• The conductors at Point A are on the ___ side of the service equipment.
• Which option correctly indicates the lead numbering and winding connections for a motor?
• If a ground rod is the only grounding electrode at a service and the GEC becomes loose, the branch-circuit breakers will take what amount of time to open during a ground fault?
• Which enclosure type would be suitable for indoor use that is subject to splashing water?
• Which option is NOT a purpose of a grounding electrode?
• According to Figure 234.411, what is the minimum size wire permitted for the branch circuit?
• At what point does a solid-state off-delay timer change state?
• OSHA's CSHO conducts comprehensive inspections where there is inadequate contractor commitment to what?
• Which type of jewelry can be safely worn on a job site?
• What is the primary purpose of an equipment grounding conductor?
• Is it true that power to the loads in a 230-volt circuit can be controlled by a relay that operates in a 24-volt circuit?
• What must be provided along with single-service cups on jobsites?
• What is the minimum required AWG size for copper grounded system conductors in high-impedance grounded neutral systems?
• Inadequate ___ electrical boxes and equipment can cause delays, extra work, or damage to already installed items.
• Which of the following motors is characterized as a universal motor?
• What is one of the primary components of a reversing starter?
• When Sw 1 is closed and the timer is set for 10 seconds, what state will the green light be in five seconds before closing the control switch?
• Point J on the ladder diagram should be connected at terminal ___ on the relay socket.
• The smallest feeder conductors permitted to be installed are what size AWG or kcmil?
• The maximum length limitation for RG-11 cable is how many feet?
• Symbol U in electrical schematics represents which of the following?
• What does a line on a ladder diagram represent?
• Which component is responsible for opening the motor circuit when the necessary conditions are met?
• Which type of transformer configuration is described for the secondary conductors in a 500 KVA transformer scenario?
• What occurs when a melting alloy overload in a magnetic motor starter actuates?
• When a motor is running normally at rated voltage, the motor is drawing how many amps if the label indicates 39.2 A?
• Metal raceways enclosing Grounding Electrode Conductors (GECs) are considered to be on the ___ of the service equipment.
• Which of the following is NOT typically classified as a bloodborne pathogen?
• What is the reason for connecting the grounding electrode within 5 feet of the entry point of a metal water pipe?
• A neutral conductor carries circuit current in what condition?
• Rubber insulating blankets and other types of insulating materials can be very helpful in working safely around batteries and equipment.
• If it is not feasible to install a grounding conductor for a replacement grounding-type receptacle, what does code allow?
• For a motor operating at 208-230/460 V with a supply from a 120/240-V panel, the minimum circuit conductor size is ___ AWG.
• What is the minimum size of the bonding jumper for a 400-amp, 480-volt delta service with 600 kcmil SE conductors?
• A(n) ___ changes AC voltage into DC voltage.
• In typical building construction, concrete is mainly used for which purpose?
• What typically happens to M1 immediately if both motors start simultaneously from an idle state?
• The minimum size circuit conductors for a 115/230-V, 5 hp, 1Ø motor supplied by a 2-pole breaker are how many AWG?
• What is the purpose of a motor winding?
• Which material has been banned for many uses in the United States?
• When a dual-voltage 3Ø motor is connected to a 480-volt circuit, how does the current compare to when connected to a 240-volt circuit?
• When selecting overload protection for a motor, which nameplate rating factors affect the selection?
• Which of the ladder diagrams shown best illustrates the use of a holding circuit that will allow the control relay to stay energized when the start button is pressed and released?
• What does a 3-pole, 40-A circuit breaker protect conductors against?
• A 3-position foot switch is typically spring-loaded to return to which position when the force is removed?
• What is an important step when working in environments with flammable materials?
• What type of cord and plug assembly installation is allowed for a new electric clothes dryer with a jumper between the neutral and ground terminals?
• What typical application could NEMA symbol III indicate?
• Which operational diagram indicates proper operation for an ON DELAY setting?
• According to the standards, how thick must plate electrodes made of iron or steel be?
• In what configuration is a grounding electrode conductor connected when installed in metal conduit?
• Which NEC® table is used to size the system bonding jumper of a separately derived AC system?
• During demolition operations, what is the purpose of barricading opening holes at specific heights?
• Nine-lead 3Ø motors are usually internally connected as which configuration?
• Which of the following is permitted for impedance grounded systems with a grounding impedance device limiting ground-fault current?
• What happens to the current in the relay when current transformer-type overload relays are activated?
• What does the 'C' in HVAC represent?
• What is the overload current for a motor with the nameplate information 230 Volt, 3-phase, 7.5 HP, and 19 Amps?
• A nonfused safety switch with a voltage rating of 250 volts ___ to be used for a certain unit?
• When considering motor loads, which factor is critical for circuit breaker sizing?
• In which type of motor is a commutator used?
• How many motors are energized when the circuit power is turned ON and after the necessary switches are activated?
• Which drawing shows the components connected to operate correctly in a control circuit?
• Which of the following is not a result of task planning?
• The conductors that are installed through the nipple into Panel D are considered to be on the ___ side of the service.
• What is required for equipment grounding conductors installed in raceways for isolated ground receptacles?
• What type of fire extinguisher does OSHA require on vehicles transporting flammable liquids?
• According to NEC® 250.114(4)(g) Exception, which of the following can be used in lieu of grounding for portable tools in non-residential occupancies?
• What should be done if rubber insulating gloves are found to have defects during field testing?
• Which of the following locations are guardrails required?
• Grounding requirements for fastened-in-place equipment operating at "over 150 volts to ground" apply to which voltage systems?
• Isolated ground receptacles are typically used for which of the following?
• Which of these statements about equipment grounding conductors is true?
• The resistance of a conductor is inversely proportional to its cross-sectional area. What happens to the resistance as the cross-sectional area of the conductor decreases?
• Which pin must Point 4 be connected to on the Siemens relay base?
• Defective tools, material or equipment shall be identified as unsafe by ___.
• According to NEC® requirements, what is the minimum number of heaters that can be installed in a starter for a motor?
• When relocating a subpanel, and the feeder conductors increased to 350 kcmil, what is the minimum size equipment grounding conductor permitted?
• When the main bonding jumper is a screw, which characteristic must it have according to the NEC®?
• Which torque refers to the torque a motor produces when the rotor is stationary and full power is applied?
• What minimum size starter is required for a 10 hp, 3-phase, 230/460-volt motor to be operated at 460 volts?
• What type of diagram uses single lines and graphic symbols to indicate the path and components of an electrical circuit?
• Which of the following is permitted to be used as an equipment grounding conductor?
• For a specific motor, what range of resistance would you expect to measure between leads 7 and 9?
• What drives the rotation of the rotor in an AC motor?
• Which of the following components is typically not part of a DC motor?
• In a 120/208-volt, 3Ø, 4-wire panel, the maximum size circuit breaker permitted to protect three motors is what amperage?
• What is the primary function of a block diagram?
• Components of a basic network include which of the following?
• Which of the following is a manual control device?
• An alternating current system of 50 to 1000 volts is required to be grounded when ___.
• The load in a control circuit is energized when which condition is met?
• To check a fuse with a continuity tester, the fuse ___ be removed from the circuit.
• For a commercial building with a 1600-ampere service, what is the correct minimum size for the main bonding jumper when supplied with multiple sets of conductors?
• Should stairwells in multistory buildings under demolition operations be illuminated for safe passage?
• Calculate the overload size for a 230 Volt, single phase, 3 HP motor with a rating of 14 Amps.
• In a three-phase system, a voltage unbalance greater than ___ from the average voltage should be investigated.
• Does your attitude toward safety play a role in preventing accidents?
• A 400-amp service requires bonding bushings due to wallowed out holes. What is the minimum size of bonding jumpers needed from the ground bar to these bushings?
• The motor overload unit for a single-phase motor fed from an ungrounded 2-wire, single-phase AC source will be placed in which conductor?
• Where should entrants of a confined space take communication during entry?
• NOTO contacts are primarily associated with which type of timing relay?
• Lumber shall be stacked on a level surface so that the stack is ___.
• What should be done before starting to install fiber optic cables?
• What is the primary difference in temperature effect on the life expectancy of a DC motor?
• What must be removed from welding cylinders prior to moving them?
• What is the primary use of soft solder in plumbing construction?
• How does grounding prevent an electrical fault?
• How far must a fire extinguisher rated not less than 10B be provided from an area using more than 5 gallons of combustible liquids or 5 pounds of flammable gas?
• What is the maximum rating of ITCB for the motor branch circuit, according to the established guidelines?
• If PB is pushed and released when the control circuit power is ON, which motor is energized?
• What does NEMA stand for?
• Which articles in the NEC® contain requirements for GFCI protection of receptacles?
• Which of the following three-phase electrical distribution systems is grounded?
• Under the OFF-Delay Relay operation, what occurs when S2 is pushed after M has been stopped by S1?
• What type of torque is required to produce the nameplate-rated output power and speed while driving a load?
• How must oxygen cylinders be stored on a job site?
• When a motor is running normally at rated voltage, it is drawing how many amps according to the nameplate?
• The primary purpose of bonding together metal equipment enclosures and metal raceways is to?
• What is one function of a motor starter in electrical systems?
• If a branch circuit is installed using metal conduit serving as the Equipment Grounding Conductor (EGC) and a bonding jumper is installed around a short section of flexible nonmetallic conduit, the jumper is in ___ with the EGC.
• If an overload in a motor branch circuit persists for a long enough time, it can cause damage to the ___.
• The critical path is composed of tasks that ___.
• When pulling fiber optic cable, the pull string shall not be connected to the ___.
• Inherent motor protection devices are reset ___.
• What is the minimum size GEC required to connect to building steel?
• Is Schedule 40 PVC conduit allowed to protect a grounding electrode conductor from physical damage?
• What should be monitored after establishing emergency action plans on construction sites?
• Which NEMA symbol represents a line-to-line connected load like a fan motor?
• What type of diagram shows the electrical connections and functions of a specific circuit using graphic symbols?
• Which locations are deemed hazardous when working in confined spaces?
• How many overload (OL) sections does a manual reversing starter require?
• The NEMA or industry standard symbol for a momentary-contact, single-circuit, normally closed, double-break pushbutton switch is shown at which location?
• What is the potential danger if the GEC is loose at the ground rod?
• Another term for an alternating relay is a ___ relay.
• What size EGC is required for a 2 hp motor supplied through a 2-pole breaker in a 120/208-V panel if the smallest conductors are used?
• What is the first action to take when another person is seriously injured?
• When coil voltage is supplied, the contacts of a solid-state on-delay relay change state when?
• If a 7.5 hp motor has a service factor of 1.20 and normally draws 17 amps, what is the maximum it can pull temporarily without damage?
• What is the maximum length allowed for a flexible cord supplying a 120-volt room air conditioner?
• A manual reversing starter includes which components?
• How does proper equipment grounding eliminate potential shock risks?
• When supplied from a 120/208-volt, 3Ø, 4-wire panelboard, the maximum size ITCB for the motor branch circuit is what?
• What are contacts that retain their state after a force is removed called?
• The size of the equipment grounding conductor is determined primarily by which factor?
• An indicating pilot light in a control circuit signals which of the following?
• When using a ladder diagram to wire a control circuit, what happens to wires with the same wire number?
• Which of the following types of grounding electrodes is prohibited?
• ___ is the quality or state of being self-governing, and does not mean someone is not part of the team.
• The industry standard method used to reverse the rotation of a 1Ø AC motor is to use a reversing starter to change the current flow direction through the ___ winding.
• Which single conductor of an alternating-current system is allowed to be installed alone in a metallic raceway?
• What is the smallest bonding jumper you can run inside a flexible metal conduit between a transformer and a 300-A panel board?
• Why is it important to describe the configuration of components in terms of series or parallel?
• What size must the equipment grounding conductor be when a 200-A fused safety switch with 125-amp fuses is installed with 8 AWG conductors?
• What occurs when control power is continuously supplied to an interval timer?
• Which clothing material is recommended for construction work?
• A computer network can be described as what?
• What minimum size starter is required for a 10 hp, 3-phase, 230/460-volt motor to be operated at 230 volts?
• Guardrails are required if an unglazed window opening presents a fall hazard of more than how many feet to the level below?
• To reverse a DC motor, which component's leads are typically reversed?
• Where should maximum safe load limits of floors be posted?
• The NEMA or industry standard symbol for a buzzer is shown at which location?
• What happens when the motors are operated beyond their rated capacity?
• When using a metal water pipe as the grounding electrode for a separately-derived system, where must the grounding electrode conductor be connected?
• The smallest circuit conductors that can be installed between the wireway and the safety switch for Motor #3 are ___ AWG.
• What is the largest 3-pole breaker permitted to be installed in Panel LA in amperes?