Journeyman Electrician Practice Test-26
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Question 1 of 10
1. Question
1 pointsThe maximum size of FMC that can be used is which of the following?
Correct
Incorrect
Refer : NEC 348.20 (b)
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Question 2 of 10
2. Question
1 pointsThe Transformer secondary is protected with GFCI which is connected to impedance heating elements. What is the maximum secondary voltage?
Correct
Incorrect
Refer NEC 424.32
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Question 3 of 10
3. Question
1 pointsA single phase motor 5 HP, 230 volts motor has a full load current of 50 amperes, What is its full load conductor ampacity in amperes?
Correct
Incorrect
Refer : NEC 430.22
50 * 125% = 62.5 amperes -
Question 4 of 10
4. Question
1 pointsIn which of the following devices the delta breakers cannot be installed?
Correct
Incorrect
Refer : NEC 408.36 C
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Question 5 of 10
5. Question
1 pointsA 120 volt 30 amp branch circuit supplies cord and attachment type air-conditioner, which of the following is the maximum full load current of an air-conditioner?
Correct
Incorrect
Refer : NEC 440.52 C
50 % * 30 = 15 amperes -
Question 6 of 10
6. Question
1 pointsWhen a supply voltage to the induction motor decreases the slip of the motor decreases.
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Incorrect
Slip = (No-load speed – full load speed) / full load speed)
full load Speed œ supply voltage
so voltage decreases …. speed decreases …. Slip Increases -
Question 7 of 10
7. Question
1 pointsA feeder assembly shall not be required for manufactured homes constructed with power supply cord attached with the distribution panel board.
Correct
Incorrect
Refer NEC 550.10 Exception No:2
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Question 8 of 10
8. Question
1 pointsSynchronous motors are widely used in industries compared to induction motors.
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Incorrect
Induction motors are widely used in industries due to lost and maintenance
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Question 9 of 10
9. Question
1 pointsIf 6 mobile homes are connected to a single feeder what is the demand factor that shall be used in calculating the load?
Correct
Incorrect
Refer : NEC 550.31
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Question 10 of 10
10. Question
1 pointsA 100 watt light in dwelling unit is on for 4 hours, if the cost of electricity is $1 per 1kwh then which of the following is the total cost of electricity that the light consumed?
Correct
Incorrect
Total Electricity consumed by light for 4 hours is = 4 * 100 = 400 Watt hour = 0.4 kwh
total cost = 0.4 * 1 = $ 0.4