Journeyman Electrician Practice Test 17

Question 1: The minimum distance that service drop wire should maintain if it is placed above the roads and driveways is .................

• 10 ft
• 15 ft
• 18 ft
• 12 ft

Question 2: The non motor operated appliance rating is 20 amperes which is supplied by a single branch circuit. what is the minimum ampere rating of branch circuit?

• 25 amperes
• 30 amperes
• 20 amperes
• 24 amperes

Question 3: Every appliance must be provided with a disconnecting means from the circuit for repairing it safely.

• True
• False

Question 4: A 4500 watt water heater is operated at 240 volts, what is the size of branch circuit that can be used for connecting it?

• 10 AWG
• 12 AWG
• 14 AWG
• 8 AWG

NEC Reference: NEC 18.75

Question 5: If only one room air conditioner is connected to a branch circuit, the maximum name plate rating of equipment should not exceed ............ % of the circuit.

• 80 %
• 60 %
• 70 %
• 75 %

Question 6: A reliable conductor to ensure the required electrical conductivity between metal parts required to electrically connected is termed as ………………….

• Branch conductor
• Bonding conductor
• Grounding conductor
• Coupling conductor

NEC Reference: NEC 100.1

Question 7: The total current delivered by two series connected batteries is 2 A, what is the carrying current of each battery?

• 1 A
• 2 A
• 4 A
• 0.5 A

Question 8: If the leakage factor of 10 KW motor is 1.2, what is the leakage factor of a 20 KW electric motor?

• 0.6
• 1.15
• 2.40
• 4.80

Question 9: The most suitable motor for commercial refrigerator is .................................

• scharge motor
• repulsion start induction run
• universal motor

Question 10: one watt is equal to ..........................

• one joule per second
• one ohm per second
• one volt per second

Question 11: The minimum size copper equipment grounding conductor for a 100 amperes circuit is …………….

• 8 AWG
• 10 AWG
• 6 AWG
• 12 AWG

NEC Reference: NEC 250.122

Question 12: How many number of service disconnects per service are allowed to be grouped in any one location?

• Four
• Five
• Six
• Seven

NEC Reference: NEC 230.71(A)

Question 13: What is the maximum size fuse allowed to protect 12 AWG THW copper branch conductor?

• 15 amperes
• 20 amperes
• 25 amperes
• 30 amperes

NEC Reference: NEC 240.4(D)(5)

Question 14: The maximum wattage of incandescent-lamps must not exceed …………… that may be used on medium bus lampholders.

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

NEC Reference: NEC 410.103

Question 15: Under normal conditions, how should be the voltmeter is connected to measure the voltage of the circuit or device?

• In series
• In parallel
• Both series and parallel
• None