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1. A single-family dwelling has threebathrooms each with the following: a lighting

fixture, a fan, and one receptacle outlet. Inone of the bathrooms, the lighting fixture,fan, and receptacle outlet are installed on adedicated 20 ampere circuit. For thisdwelling, the minimum number of 20 amperecircuits required to serve the bathrooms iswhich of the following:

a. Two b. Threec. Four d. Five

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2. One building is supplied power from another building on a

non-industrial property with a single owner. The undergroundfeeder is protected by a 100 ampere circuit breaker in the first

building. Qualified persons are not always available to servicethe installation; therefore, the disconnecting means for thesecond building must be which of the following:

a. Located inside the second building, and is not required to

be located near the point where the conductors enter thebuilding

b. At the closest practical point where the conductors enterthe building, and may be located either inside or outside of the

buildingc. The circuit breaker in the first buildingd. Located on the outside of the building, near the point

where the conductors enter the building

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3. In a single-phase, 3-wire electricalsystem, the middle conductor must be which

of the following:

a. Hot b. Groundedc. Ungrounded d. Out-of-phase

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4. In a 3-wire, single phase electrical system,the nominal voltage must be 120 volts

between the ungroundedconductor and the neutral, and the voltsbetween the two ungrounded conductorsmust be which of the following:

a. 120 volts b. 240 voltsc. 288 volts d. 600 volts

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5. In a single-phase, 3-wire electricalsystem, the hot conductors are referred to as

which of the following:

a. Neutral conductorsb. Grounded conductorsc. Nominal conductorsd. Ungrounded conductors

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6. The current flowing through the neutral ofa 120/240 volt 3-wire, single-phase electrical

system is calculated as which of thefollowing?

a. The difference between the current ofthe two ungrounded conductorsb. The sum of the current flowing on thetwo ungrounded conductors

c. The current of the first ungroundedconductor divided by the current of thesecond ungrounded conductor

d. 240 volts divided by 120 volts

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7. The exposed non-current carrying metalparts of a hand-held cord-and-plug drill must

be grounded in which of the followingscenarios:

a. The power source is greater than 150volts to groundb. The drill is for residential usec. The drill is being used in a hazardous

locationd. All of the above

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8. If a rod electrode is required for groundingpurposes and a layer of rock restricts the rod

from being driven into the ground, which ofthe following alternate methods ofinstallation shall be used:

a. Connect to the nearest steel section ofthe buildingb. Connect to the metal water main

c. Bury the rod in a trench which is aminimum of 2 1/2 feet deepd. Bury the rod in steel conduit with a

minimum of 18 inches of cover

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9. The bonding jumper between asupplemental electrode and service

equipment shall not be required to be largerthen which of the following:

a. #12 b. #10c. #8 d. #6

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10. The maximum overcurrent device sizerequired to protect a 5-foot length of 1-inch

liquid tight flexible metal conduit with noequipment grounding conductors and groundlisted fitting terminations is which of thefollowing:

a. 30 amperes b. 40 amperesc. 60 amperes d. 120 amperes

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11. Terminals connected to a groundedconductor shall be identified in which of the

following ways:

a. Identification shall be substantially whitein colorb. Connection must use a terminal screwthat is not readily removable and is greenin color

c. Identification must include an engravedmetal tagd. None of the above

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12. The receptacle example listed belowwhich may be connected to a small

appliance branch circuit is which of thefollowing:

a. Garage ceiling receptacle for anautomatic garage door openerb. Any receptacle which is within 20 feetof the kitchen

c. An electric clock plugged in at thedining roomd. An electric hair dryer

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13. Open conductors which are not serviceentrance cables shall not be installed less

than which of the following:

a. 3 feet from grade levelb. 6 feet below grade levelc. 8 feet below grade leveld. 10 feet from grade level

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14. The service disconnection means in abuilding shall not have more than how many

switches or circuit breakers:

a. 6 b. 8c. 10 d. 20

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15. The total number of undergroundconductors for an outside lighting circuit on a

single common neutral conductor is which ofthe following:

a. 6b. 8c. There is no limit specifiedd. Underground conductors specified in

this example are prohibited34 Electrician's Exam Study Guide 

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16. If an individual 30 amp branch circuitfeeds a single non-motorized equipment

receptacle, then the receptacle amperagemust be which of the following:

a . 20 b. 30c. 40 d. None of the above

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17. Conductors run in parallel racewaysmust have equipment grounding conductors

which are which of the following:

a. Run in individual racewaysb. Supported every 6 inchesc. Run in parallel in each racewayd. Protected from excessive temperature

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18. A surge arrestor of less than 1000 voltsnominal shall have a ground connecting

conductor which isno smaller than which of the following sizes:

a. #8 b. #10c. #12 d. #14

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19. When there is more than one nominalvoltage system in the building, ungrounded

feeder conductors must be which of thefollowing:

a. Connected through a transfer switchb. Separately identifiedc. Run in individual conduitsd. Identified using the same color

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20. Single-point grounding is allowed at thesource of a separately derived system when

which of the following conditions exists:

a. A separate equipment groundingconductor is provided at each building andenclosureb. The neutral is insulated and isolatedfrom earth, except at one location

c. An equipment grounding conductor isrun with the phase conductorsd. All of the above

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21. When measuring the area of a dwellingin order to determine the lighting load, the

outside dimensions are used, which includeany porches, garages, or carports.

a. True b. False

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22. The continuous load supplied by abranch circuit shall not, under any

circumstances, exceed 80% of the conductorampacity before any derating factors areapplied.

a. True b. False

Wiring Requirements and Protection

35

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23. The computed load of a feeder must be75% or less than the sum of the loads on the

branch circuits after any derating factors areapplied.

a. True b. False

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24. Under certain conditions, a feederneutral may be smaller than the ungrounded

conductors in a wiring system.

a. True b. False

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25. Branch circuit rating is determined by thesize of the overcurrent device.

a. True b. False