Journeyman Electrician Practice Test 9

Question 1: The disconnect switch Rating for motor loads is kept higher than motor conductor to permit the motor to start.

• True
• False

Question 2: If a lamp resistance is 500 ohms and the ammeter near to the lamp indicates 5 mA. What is the power dissipated in the lamp?

• 2.5 w
• 12.5 mw
• 125 mw
• 25 mw

Question 3: The rating of feeder tap over current terminating device is 40 Amperes. Which of the following ampacity feeder tap can be used if the conductor length is less than 10 feet.?

• 38 Amperes
• 39 Amperes
• 41 Amperes
• 35 Amperes

NEC Reference: NEC 240.21

Question 4: The maximum recommended voltage drop in a branch circuit is ........................ percentage

• 3
• 5
• 4
• 2

NEC Reference: NEC 210.19

Question 5: What is the minimum size of 3 wire service for single dwelling with an initial load of 20 kVA or more.

• 100 Amperes
• 150 Amperes
• 50 Amperes
• 90 Amperes

NEC Reference: NEC 230.79(C)

Question 6: Equipment grounding conductors are identified by .............. color.

• Red
• Green
• Grey

NEC Reference: NEC 310.12(B)

Question 7: A Quick Recovery electric heater is rated at 4500 watts 240 volts. What rating of circuit breaker is required for protecting it?

• 30 Amperes
• 25 Amperes
• 20 Amperes
• 15 Amperes

NEC Reference: NEC 422.13

Question 8: A three phase 4 wire electrical system phase-phase voltage is 480 Volts. What is its phase to neutral voltage.

• 480 volts
• 240 Volts
• 277 Volts
• 377 Volts

Question 9: A single phase motor can be protected against overload short circuit and ground fault by a single over current device.

• True
• False

NEC Reference: NEC 430.32

Question 10: In an electrical circuit the fault current returns to the source power supply.

• False
• True

Question 11: In a trade size of ¾ EMT, How many 14 AWG RHH conductors can be pulled in the raceway. The RHH conductors are coverless.

• 6 conductors
• 10 conductors
• 16 conductors
• 24 conductors

Question 12: A 4 hp 230 V single phase motor has a service factor of 1.15 and name plate current rating of 25 A. What size dual element fuse can be used to protect the motor from overloads, short circuit and ground faults?

• 25 A
• 30 A
• 28 A
• 35 A

NEC Reference: NEC 430.32(A)(1)

Question 13: How many types of 4 wire feeders shall be permitted to utilize a common neutral?

• 2
• 3
• 4
• 5

NEC Reference: NEC 215.4

Question 14: How much maximum percentage of auxiliary gutters interior cross sectional area can be filled with conductors?

• 30 %
• 20 %
• 60 %
• 50 %

NEC Reference: NEC 366.22

Question 15: The fuses used for circuit protection shall be connected in ……………….

• Series
• Parallel
• Both series and parallel
• All the options are correct

NEC Reference: NEC 240.15(A)