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Journeyman Electrician Practice Test Questions and Answers
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Journeyman Electrician Practice Test Questions and Answers
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Journeyman Electrician Practice Test Questionsand Answers
When an electrical circuit tested with ohmmeter, a short circuit is indicated by a reading of
...................... CORRECT ANS-Zero
For stationary small motors rated less than .................., the branch circuit over current device
may serve as a controller. CORRECT ANS-1/ 8 horse power
What is the demand factor applied in calculating feeder or service conductor load for a
commercial kitchen having four electrical equipment CORRECT ANS-80 %
Demand factor for kitchen equipment in other than dwelling unit shall be applied according to
220.56 table.
A 440 volts motor has a full load current of 34 amperes. what size disconnecting means is
required? CORRECT ANS-40 amperes
The rating of disconnecting means is 115% of full load current.34 * 1.15 = 39.1 amperes.The
nearer rating is 40 amperes.
If two 4 ohm resistors are connected in series which are powered by 240 volts power source,
what is the current flow across one 4 ohm resistor? CORRECT ANS-30 amperes
Total resistance of the circuit = 4 + 4 = 8 ohms
Current flow in the circuit = 240 /8 = 30 amperes
In series circuit flow in the circuit elements is same. so 30 amperes current will flow in both
series resistors.
, What is the minimum size of THWN conductors required for single phase 10 HP motor
connected to 240 volts supply? CORRECT ANS-6 AWG THWN Copper
FLI current of single phase 10 HP motor at 230 volts = 50 amperes
Minimum conductor ampacity = 50 * 125% = 62.5 amperes
6 AWG THWN Copper with 65 amperes capacity at 75 0C is suitable conductor for the motor
In a metal wire-ways, the distance between supports shall not exceed .............. ft. CORRECT
ANS-10
Underground wiring shall be installed in which of the following conduit
a.)Threaded rigid metal
b.)Threaded steal intermediate metal
c.)All options are correct
.)PVC CORRECT ANS-All options are correct
What is the resistance of 80 watt Light bulb rated at 120 volts? CORRECT ANS-180 ohms
When branch circuits used at outside, the size of overhead conductors for 600 volts or less, for
spans upto 50 feet, shall not be less than ............. copper. CORRECT ANS-NO 10
For Copper it is NO.10for aluminum it is NO 8
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