Journeyman Electrician Practice Test-4
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Free online quiz test on Journeyman exam Practice test includes questions on NEC and basic Electrical theory
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Question 1 of 20
1. Question
1 pointsThe size of conductors used in over head services with out any exceptions shall not be less than ………… copper.
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Incorrect
Refer: NEC 230.23 (B)
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Question 2 of 20
2. Question
1 pointsA 2 KW electric kettle takes 6 minutes to boil. how much does it cost to boil it once a day for 30 days at 21 c/kwh?
Correct
Incorrect
Sol:
cost = power in KW * hours used * cost per KW
= 2 * 0.1*30 *0.21
= $2.52 -
Question 3 of 20
3. Question
1 pointsIn a direct current electric circuit, which of the following effect the current flow?
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Question 4 of 20
4. Question
1 pointsWhat is the delay time permitted to start emergency generators in-case of normal power supply failure?
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Incorrect
Refer: 700.12 [B][1]
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Question 5 of 20
5. Question
1 pointsThe minimum spacing between wood or other combustible materials and an incandescent lamp shall be …….. inches
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Incorrect
Refer : NEC 600.9 [C]
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Question 6 of 20
6. Question
1 pointsPVC conduit shall be permitted to use in underground wiring where it is buried under not less than ……….. of cover
Correct
Incorrect
Refer : NEC 515.8
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Question 7 of 20
7. Question
1 pointsA string of outdoor lights that is suspended between two points is called as serial lighting.
Correct
Incorrect
Refer : NEC 100 [definitions]
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Question 8 of 20
8. Question
1 pointsThe wiring conductors of two or more emergency circuits supplied from same source shall not be permitted in the same raceway.
Correct
Incorrect
Refer : NEC 700.10 [B]
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Question 9 of 20
9. Question
1 pointsWhat is allowable ampacity of NO.8 THWN conductor placed in a room where the ambient temperature of the room is at 42 degrees C?
Correct
Incorrect
Refer : NEC Table 316.6
As per the table the allowable ampacity of NO.8 THWN is 50 ampere.
The correction factor for 420C is 0.93, So 0.93 * 50 = 46.5 amperes. -
Question 10 of 20
10. Question
1 pointsEnclosures, cabinets, cut boxes installed in wet locations shall be ……………
Correct
Incorrect
Refer : NEC 312.2
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Question 11 of 20
11. Question
1 pointsA 2 ft branch conductor with a resistance of 2.5 ohms is supplied with 120 V power supply. If 3 amperes current flows in the conductor then what is voltage drop across the conductor?
Correct
Incorrect
Voltage drop = current flow in amperes * Resistance of the conductor
= 3 * 2.5 = 7.5 Volts. -
Question 12 of 20
12. Question
1 pointsWhich of the following electrical quantity definition is the pressure required to force one ampere electrons through a one ohm resistor?
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Question 13 of 20
13. Question
1 pointsThe ohm’s law states that in an electrical circuit the current is …………………. proportional to resistance of the circuit.
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Question 14 of 20
14. Question
1 pointsWhich of the following is connected in series with the load to measure the required parameter?
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Question 15 of 20
15. Question
1 pointsWhen voltage remains constant in the circuit, to double the current flow in circuit, the resistance should be ……………..
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Question 16 of 20
16. Question
1 pointsA concealed conductor in electrical wiring means:
Correct
Incorrect
Refer : NEC code 100 definitions
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Question 17 of 20
17. Question
1 pointsA 250 amperes panel board may supply the maximum load of ……………………
Correct
Incorrect
Refer: NEC code 408.30
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Question 18 of 20
18. Question
1 pointsFor a single family dwelling unit what is the minimum allowable current rating of 3-wire service-entrance conductors?
Correct
Incorrect
Refer: NEC code 230.42(B)
Ungrounded conductors rating for specific installations not to be smaller than the disconnecting means
Refer: NEC code 230.79 (C)
For a single family dwelling unit the service disconnecting means shall have a rating not less than 100 amperes
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Question 19 of 20
19. Question
1 pointsWhat shall be the maximum weight of the lightening fixture when it is supported only by the screw shell of the lamp holder?
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Incorrect
Refer: NEC code 410.30 (A)
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Question 20 of 20
20. Question
1 pointsSmall motors rated not more than …………….. may use a branch circuit over current protection device as the controller.
Correct
Incorrect
Refer : NEC code 430.81(A)