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Journeyman Electrician Practice Test questions with verified answers.
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Journeyman Electrician Practice Test questions with verified answers.
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Journeyman Electrician Practice Test questions with verified answers1. Electrical Generator works on the principle of:: Flemings Right hand rule | | | | | | | | | |
2. Which of the following quantity is the same in a series electrical circuit:: -
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Electrical current |
3. The transformer oil used in transformers acts as:: Both insulating material and
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coolant
|
4. Induction motor during no load condition will have a power factor in the | | | | | | | | | | | |
range:: 0.2
| |
5. The NEC states each building or other structure shall have only one dis-
| | | | | | | | | | | |
connecting means unless
| .: The multiple disconnecting means consistsof no
| | ||||||||| | | | | | | |
more than six, and are housed in separate enclosures with a main service
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disconnecting means in each enclosure.
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6. At buildings where communications systems are likely to be used, an
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intersystem bonding termination shall be provided for the communications
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systems at an accessible location at the service equipment. It shall be an
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aluminum or copper busbar not less than ¼ in. thick x 2 in. wide and be of
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sufficient length to accommodate at LEAST
| | terminations for communi- | | | | | |
cations systems in addition to other connections.: Three
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7. The ampacity of a conductor is defined by the NEC to be the maximum
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current,in amperes,a conductor can carry continuously under the conditionsof
| | | | | | | | | | | |
use without exceeding
| | .: It's temperature rating | | | |
8. A disconnect switch enclosure installed in a Class II, Division 2 location
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shall be listed as
| | .: Dustthight
| | |
9. The interior of enclosures or raceways installed underground shall be con-
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sidered as a
| location.: Wet
| | |
10. Determine the ampacity (current-carrying capacity) of four (4) size 1/0 AWG | | | | | | | | | |
THW copper current-carrying conductors installed in a common raceway withan
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ambient temperature of 86 degrees F.: 120 amperes
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11. The NEC defines a continuous load to be a load where the maximum
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current on the circuit is expected to continue for at LEAST hours ormore.:
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Three
|
12. Given:You have determined a conductor has a computed ampacity of 75
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amperes. What is the MAXIMUM standard ampere rating of the overcurrent
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protection device the NEC permits to protect this circuit where this is not a
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motor circuit or part of a multioutlet branch circuit supplying more than one
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receptacle?: 80 amperes
| | |
13. A 208-volt, 3-phase, 50 hp, squirrel-cage, continuous-duty, ac motor has a
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1 |/ |27
,full-load running current rating of
| | | | .: 143 amperes
| | |
14. Which of the following is permitted in the dedicated electrical space abovean
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indoor installed 3-phase, 480Y/277-volt panelboard?: sprinkler protection
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2 |/ |27
, 15. Determine the MINIMUM trade size electrical metallic tubing (EMT) requiredto | | | | | | | | | |
enclose eight (8) size 6 AWG copper conductors with THHW insulation, when
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installed in a 50 foot conduit run.: 1¼ in.
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16. Where exceptions are not applicable, when a feeder supplies a continuous | | | | | | | | | |
load of 240 amperes, the overcurrent protection device protecting this circuit
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shall have a rating of at LEAST .: 300 amperes
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17. Liquidtight flexible metal conduit (LFMC) shall be securely fastened WITH-IN | | | | | | | | | |
|of each box or other conduit termination.: 12 inches
| | | | | | | |
18. Where a pull box to be installed will contain conductors of size 4 AWG and | | | | | | | | | | | | | |
larger, and a straight pull of the conductors is to be made, the length of the box
| | | | | | | | | | | | | | | | |
shall NOT be less than
| | times the trade diameter of the largest conduit
| | | | | | | | | |
entering the box.: Eight
| | | |
19. Conduit or tubing nipples not over 24 inches in length may be filled to a | | | | | | | | | | | | | |
MAXIMUM of
| of their cross-sectional area.: 60 percent | | | | | |
20. Determine the MAXIMUM number of size 14 AWG THHN conductors per- | | | | | | | | | |
mitted to be installed in a trade size 3/8 in. flexible metal conduit (FMC) that
| | | | | | | | | | | | | | |
contains a bare size 14 AWG grounding conductor,when the FMC has external
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fittings.: four
| |
21. A device or group of devices that serves to govern, in some predetermined
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manner, the electric power delivered to the apparatus to which it is connectedto,
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is recognized as a in the NEC.: controller
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22. What is the MAXIMUM distance permitted between supports of straight
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runs of threaded trade size 2 in. rigid metal conduit (RMC)?: 16 feet
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23. Which of the following listed types of storage batteries is NOT permitted | | | | | | | | | | |
for use as a source of power for emergency systems?: automotive
| | | | | | | | | | |
24. A general-use snap switch with an ampere rating of NOT less than
| | | | | | | | | | | ||
shall be permitted as the motor controller for a single-phase 2 hp, 240-volt
| | | | | | | | | | | | |
motor.: 24 amperes
| | |
25. In guest rooms of hotels, motels, and sleeping rooms of dorms a MINIMUMof
| | | | | | | | | | | | | ||||
| general-purpose receptacles installed in the room is/are required to be
| | | | | | | | | | | |
readily accessible.: two
| | |
26. A listed shall be installed in or on all emergency systems switch-
| | | | | | | | | |
boards and panelboards.: surge protective device (SPD)
| | | | | | |
27. Where a size 4 AWG or larger conductor enters a panelboard, which of the | | | | | | | | | | | | |
following must be provided?: An insulated bushing.
| | | | | | |
28. Class locations are those that are hazardous because of the pres- | | | | | | | | |
ence of easily ignitable fibers or where materials producing combustible
| | | | | | | | | |
flyings are handled, but in which such fibers/flyings are not likely to be in
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suspension in the air in quantities sufficient to produce ignitable mixtures.: III
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