NYC Master Electrician Exam Department
of Buildings Licensing Test (Latest Update
) Questions & Answers {Grade
A} 100% Correct
The largest standard rating for fuses and inverse time circuit breakers is?
A) 1000 amps
B) 1600 amps
C) 1200 amps
D) 6000 amps - correct answer D) 6000 amps
Article 240.6
,A feeder tap less than 25 feet long does not require overcurrent protection at the tap if
the Ampacity of the tap conductor is at least?
A) 50% of the feeder conductor
B) 40% of the feeder conductor
C) 33 1/3% of the feeder conductor
D) 20% of the feeder conductor - correct answer C) 33 1/3 % of the feeder conductor
Article 240.21 (B) (2)
The power factor of a system or circuit is?
A) the ratio of true power to apparent power
B) the ratio of impedance to reactance
C) the relationship of volts and ohms
,D) none of the above - correct answer A) The ratio of true power to apparent power
Which of the following systems and materials is not permitted to be used as a
grounding electrode?
A) metal underground gas piping
B) zinc coated steel
C) stainless steel
D) copper pipe larger than the metric designator 21 - correct answer A) metal
underground gas piping
Article 250.52 (B)
How must a branch circuit supplying a domestic hot water heater with a capacity of 120
gallons or less be sized?
, A) 100% of its nameplate rating
B) 110% of its nameplate rating
C) 125% of its nameplate rating
D) 150% of its nameplate rating - correct answer C) 125% of its nameplate rating
Article 422.13
The walls and roofs of transformer vaults shall be constructed of materials that have
adequate structural strength for the conditions with a minimum fire-resistance rating
of ______ hours?
A) 2
B) 3
C) 4
of Buildings Licensing Test (Latest Update
) Questions & Answers {Grade
A} 100% Correct
The largest standard rating for fuses and inverse time circuit breakers is?
A) 1000 amps
B) 1600 amps
C) 1200 amps
D) 6000 amps - correct answer D) 6000 amps
Article 240.6
,A feeder tap less than 25 feet long does not require overcurrent protection at the tap if
the Ampacity of the tap conductor is at least?
A) 50% of the feeder conductor
B) 40% of the feeder conductor
C) 33 1/3% of the feeder conductor
D) 20% of the feeder conductor - correct answer C) 33 1/3 % of the feeder conductor
Article 240.21 (B) (2)
The power factor of a system or circuit is?
A) the ratio of true power to apparent power
B) the ratio of impedance to reactance
C) the relationship of volts and ohms
,D) none of the above - correct answer A) The ratio of true power to apparent power
Which of the following systems and materials is not permitted to be used as a
grounding electrode?
A) metal underground gas piping
B) zinc coated steel
C) stainless steel
D) copper pipe larger than the metric designator 21 - correct answer A) metal
underground gas piping
Article 250.52 (B)
How must a branch circuit supplying a domestic hot water heater with a capacity of 120
gallons or less be sized?
, A) 100% of its nameplate rating
B) 110% of its nameplate rating
C) 125% of its nameplate rating
D) 150% of its nameplate rating - correct answer C) 125% of its nameplate rating
Article 422.13
The walls and roofs of transformer vaults shall be constructed of materials that have
adequate structural strength for the conditions with a minimum fire-resistance rating
of ______ hours?
A) 2
B) 3
C) 4
