Journeyman Electrician Practice Test 7

Question 1: What is the smallest size of conductor for power work as per NEC?

• NO . 14
• NO . 12
• NO . 10
• NO . 8

Question 2: The motor ground fault protective device need to be capable of carrying the starting current of the motor.

• TRUE
• FALSE

NEC Reference: NEC 430.53

Question 3: Dead ends of metal wireways need not be closed.

• True
• False

NEC Reference: NEC 376.58

Question 4: In wet area a raceway, fittings shall be spaced not less than ...........inch

• 1/8
• 1/4
• 1/2
• 3/4

NEC Reference: NEC 300.6

Question 5: The Minimum working clear distance in front of the enclosed equipment operating at a voltage 240 volts is ................ feet

• 1
• 2
• 3
• 4

NEC Reference: NEC 110.26

Question 6: Working space in rooms allocated for electrical equipment shall not be used for .............

• Storage of equipment
• Maintenance
• Testing purpose
• Inspection and service

NEC Reference: NEC 110.26(B)

Question 7: The conductors sized 1/0 AWG or smaller shall be permitted to be run in parallel for frequencies higher than ................... HZ.

• 300
• 360
• 120
• 240

Question 8: What type of lamp holders required in a branch circuit has the rating of 20 amp or more?

• brass
• porcelain coated
• heavy duty

NEC Reference: NEC 210.21

Question 9: The minimum thickness of the sealing compound of completed seal conduit, except where it is used in cables shall not be less than ............ mm

• 18
• 16
• 14
• 12

NEC Reference: NEC 501.15

Question 10: In which of the following the panel boards must be enclosed?

• Cutout boxes
• Cabinets
• All options are correct
• Enclosures designed for the purpose

NEC Reference: NEC 408.38

Question 11: The maximum wattage of incandescent lamps that may be used on medium base lamp holders must not exceed .............

• 200 watts
• 300 watts
• 400 watts
• 500 watts

NEC Reference: NEC 410.103

Question 12: How many sets of 3 wire feeders shall be permitted to utilize a common neutral?

• 3
• 4
• 5
• 6

NEC Reference: NEC 215.4

Question 13: In an electrical circuit the power dissipation in a resistor will be 1.2 W, which of the following resistor is best suitable to use under this power dissipation.

• carbon film
• metal film
• thick film
• wire wound

Question 14: An ohm meter connected across a 120 volts electrical heater shows 7.5 ohms, how much current the heater draws?

• 16 amperes
• 2.13 amperes
• 0.0625 amperes
• 0.47 amperes

Question 15: A NO.6 THW conductor is placed in a room where the ambient temperature of room is 52⁰C. What is its allowable ampacity?

• 65 amperes
• 50 amperes
• 67 amperes
• 44 amperes

NEC Reference: NEC 310.15(B)(2)(b)

Question 16: In a series circuit with three resistors of 4 ohms, 6 ohms, and 10 ohms, what is the total resistance?

• 10 ohms
• 16 ohms
• 20 ohms
• 4 ohms

Question 17: When a switch in a circuit is open, what voltage appears across the switch terminals?

• Zero volts
• Half the source voltage
• Equal to the source voltage
• Double the source voltage

Question 18: What is the power factor of an AC circuit that has only resistive loads such as electric heaters and incandescent lights?

• 0.5
• 0.8
• 1.0
• 0.0

Question 19: In a perfectly balanced 3-phase 4-wire wye system, how much current flows in the neutral conductor?

• Equal to the largest phase current
• One third of the phase current
• Zero
• Three times the phase current

Question 20: Service conductors must have a minimum clearance of how many feet from windows that can be opened?

• 1 foot
• 2 feet
• 3 feet
• 5 feet

NEC Reference: NEC 230.9(A)

Question 21: Unused openings in electrical enclosures, boxes, and panelboards must be effectively closed. True or False?

• True
• False

NEC Reference: NEC 408.7

Question 22: Receptacles installed in a wet location must have a cover that keeps the receptacle weatherproof even while a cord is plugged in. True or False?

• True
• False

NEC Reference: NEC 406.9(B)(1)

Question 23: When a snap switch is used as a motor circuit switch, it must be rated at least what percentage of the motor full-load current?

• 100%
• 115%
• 125%
• 150%

NEC Reference: NEC 404.14(B)

Question 24: Flexible metal conduit (FMC) used as a fixture connection does not need additional support if it is no longer than how many feet?

• 3 feet
• 4 feet
• 6 feet
• 10 feet

NEC Reference: NEC 348.30(A)

Question 25: NM cable installed where it is exposed to physical damage must be protected. True or False?

• True
• False

NEC Reference: NEC 334.15(B)

Question 26: What is the maximum total degrees of bends allowed in PVC conduit between two pull points?

• 90 degrees
• 180 degrees
• 270 degrees
• 360 degrees

NEC Reference: NEC 352.26

Question 27: How many small appliance branch circuits are required in the kitchen of a dwelling unit?

• One 15A circuit
• At least two 20A circuits
• One 20A circuit
• Three 15A circuits

NEC Reference: NEC 210.11(C)(1)

Question 28: A household dishwasher must be supplied by an individual (dedicated) branch circuit. True or False?

• True
• False

NEC Reference: NEC 422.13

Question 29: A 120-volt RMS AC source has a peak (maximum) voltage of approximately how many volts?

• 120 volts
• 150 volts
• 170 volts
• 240 volts

Question 30: A capacitor in a circuit blocks DC but allows AC to pass. True or False?

• True
• False