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JOURNEYMAN ELECTRICIAN PRACTICE TEST
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JOURNEYMAN ELECTRICIAN PRACTICE TEST
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JOURNEYMAN ELECTRICIAN PRACTICE TESTElectrical Generator works on the principle of:
Flemings Right hand rule
Which of the following quantity is the same in a series electrical circuit:
Electrical current
The transformer oil used in transformers acts as:
Both insulating material and coolant
Induction motor during no load condition will have a power factor in the range:
0.2
The NEC states each building or other structure shall have only one disconnecting
means unless _____.
The multiple disconnecting means consists of no more than six, and are housed in
separate enclosures with a main service disconnecting means in each enclosure.
At buildings where communications systems are likely to be used, an intersystem
bonding termination shall be provided for the communications systems at an accessible
location at the service equipment. It shall be an aluminum or copper busbar not less
than ¼ in. thick x 2 in. wide and be of sufficient length to accommodate at LEAST _____
terminations for communications systems in addition to other connections.
Three
The ampacity of a conductor is defined by the NEC to be the maximum current, in
amperes, a conductor can carry continuously under the conditions of use without
exceeding ______.
It's temperature rating
A disconnect switch enclosure installed in a Class II, Division 2 location shall be listed
as _____.
Dustthight
The interior of enclosures or raceways installed underground shall be considered as a
_____ location.
Wet
,Determine the ampacity (current-carrying capacity) of four (4) size 1/0 AWG THW
copper current-carrying conductors installed in a common raceway with an ambient
temperature of 86 degrees F.
120 amperes
The NEC defines a continuous load to be a load where the maximum current on the
circuit is expected to continue for at LEAST____ hours or more.
Three
Given: You have determined a conductor has a computed ampacity of 75 amperes.
What is the MAXIMUM standard ampere rating of the overcurrent protection device the
NEC permits to protect this circuit where this is not a motor circuit or part of a multioutlet
branch circuit supplying more than one receptacle?
80 amperes
A 208-volt, 3-phase, 50 hp, squirrel-cage, continuous-duty, ac motor has a full-load
running current rating of _____.
143 amperes
Which of the following is permitted in the dedicated electrical space above an indoor
installed 3-phase, 480Y/277-volt panelboard?
sprinkler protection
Determine the MINIMUM trade size electrical metallic tubing (EMT) required to enclose
eight (8) size 6 AWG copper conductors with THHW insulation, when installed in a 50
foot conduit run.
1¼ in.
Where exceptions are not applicable, when a feeder supplies a continuous load of 240
amperes, the overcurrent protection device protecting this circuit shall have a rating of
at LEAST _____.
300 amperes
Liquidtight flexible metal conduit (LFMC) shall be securely fastened WITHIN _____ of
each box or other conduit termination.
12 inches
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
,Conduit or tubing nipples not over 24 inches in length may be filled to a MAXIMUM of
_____ of their cross-sectional area.
60 percent
Determine the MAXIMUM number of size 14 AWG THHN conductors permitted 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 fittings.
four
A device or group of devices that serves to govern, in some predetermined manner, the
electric power delivered to the apparatus to which it is connected to, is recognized as a
_____ in the NEC.
controller
What is the MAXIMUM distance permitted between supports of straight runs of threaded
trade size 2 in. rigid metal conduit (RMC)?
16 feet
Which of the following listed types of storage batteries is NOT permitted for use as a
source of power for emergency systems?
automotive
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
In guest rooms of hotels, motels, and sleeping rooms of dorms a MINIMUM of _____
general-purpose receptacles installed in the room is/are required to be readily
accessible.
two
A listed _____ shall be installed in or on all emergency systems switchboards and
panelboards.
surge protective device (SPD)
Where a size 4 AWG or larger conductor enters a panelboard, which of the following
must be provided?
An insulated bushing.
Class _____ locations are those that are hazardous because of the presence of easily
ignitable fibers or where materials producing combustible flyings are handled, but in
, which such fibers/flyings are not likely to be in suspension in the air in quantities
sufficient to produce ignitable mixtures.
III
A single-phase, 240-volt, 15 kVA standby generator may be loaded to a MAXIMUM of
_____ per line.
62.50 amperes
All motors shall be considered as _____ unless the nature of the apparatus it drives is
such that the motor will not operate continuously.
continuous duty
Where the motor controller also serves as a disconnecting means, it shall open all
_____ conductors to the motor.
ungrounded
Before demand factors are taken into consideration for commercial buildings, general-
purpose receptacle loads are to be computed at NOT less than _____ per outlet.
180 VA
Conductors with ______ insulation have a greater ampacity when used in a dry location
compared to when used in a wet location.
THHW
Isolating devices or equipment disconnecting means of solar photovoltaic systems shall
be installed in circuits connected to equipment at a location within the equipment, or
within sight and within at LEAST ______ of the equipment
10 feet
A single-phase, 125-volt receptacle installed to serve a washing machine in the laundry
room of a dwelling unit must be installed within at LEAST ______ of the intended
location of the appliance
6 feet
Standard trade size 2 in. rigid Schedule 40 polyvinyl chloride conduit (PVC), shall be
supported at LEAST every _____.
5 feet
For an ac system operating at less than 1000 volts, a main bonding jumper shall
connect the grounded conductor(s) to _____.
each service disconnecting means enclosure
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