NYC ELECTRICIAN REAL EXAM | QUESTIONS AND ANSWERS |
VERIFIED ANSWERS GRADED A+ | LATEST EXAM UPDATE
What wire has the highest resistance? - CORRECT ANSWER - Chromium
Z- Impedance - CORRECT ANSWER - The total opposition to an AC circuit,
combining all resitances
Z= square root of R^2 + (XL- XC)^2
True Power - CORRECT ANSWER - Total power of circuit in Watts
P(true)= P(App.) x PF
Oil is used in many large transformers to? - CORRECT ANSWER - To
insulate the coils
Apparent Power - CORRECT ANSWER - Starting power
P(App) = E x I (Volt Amperes)
Power Factor - CORRECT ANSWER - P(True) / P(App) OR PF=R/Z
Xc= Capacitive Reactance - CORRECT ANSWER - Xc= 1/ (2)(π)(F)(C) OR
159,000/ (f x μfd)
Xl= inductive reactance - CORRECT ANSWER - Xl= (2)(π)(F)(L)
Circuit breakers used for switching shall be marked: - CORRECT ANSWER -
SWD or HID
, An insulated wire shall have its AWG marking every _______ feet -
CORRECT ANSWER - Two
The cold resistance is ________ than the hot resistance. - CORRECT
ANSWER - Less than
Celsius to Fahrenheit - CORRECT ANSWER - F = 9/5C + 32
Wire Temp. Abbreviations - CORRECT ANSWER - No H = 60° C
1 H = 75°C
2 H= 90°
Voltage is _________ to the # of turns - CORRECT ANSWER - Proportional
To select the proper fuse, it is necessary to know the... - CORRECT ANSWER
- voltage and amperage
When under ordinary conditions, device boxes for concealed work shall have a
depth of not less than... - CORRECT ANSWER - 1/2"
The largest size conductor that may be used in under floor raceway is... -
CORRECT ANSWER - that for which it is designed for
A 277V light circuit may not be used to supply... - CORRECT ANSWER - A
standard medium base
To determine the insulation resistance of a newly installed wiring system, best
procedure is t megger test... - CORRECT ANSWER - between the wires and
from each wire to the conduit
VERIFIED ANSWERS GRADED A+ | LATEST EXAM UPDATE
What wire has the highest resistance? - CORRECT ANSWER - Chromium
Z- Impedance - CORRECT ANSWER - The total opposition to an AC circuit,
combining all resitances
Z= square root of R^2 + (XL- XC)^2
True Power - CORRECT ANSWER - Total power of circuit in Watts
P(true)= P(App.) x PF
Oil is used in many large transformers to? - CORRECT ANSWER - To
insulate the coils
Apparent Power - CORRECT ANSWER - Starting power
P(App) = E x I (Volt Amperes)
Power Factor - CORRECT ANSWER - P(True) / P(App) OR PF=R/Z
Xc= Capacitive Reactance - CORRECT ANSWER - Xc= 1/ (2)(π)(F)(C) OR
159,000/ (f x μfd)
Xl= inductive reactance - CORRECT ANSWER - Xl= (2)(π)(F)(L)
Circuit breakers used for switching shall be marked: - CORRECT ANSWER -
SWD or HID
, An insulated wire shall have its AWG marking every _______ feet -
CORRECT ANSWER - Two
The cold resistance is ________ than the hot resistance. - CORRECT
ANSWER - Less than
Celsius to Fahrenheit - CORRECT ANSWER - F = 9/5C + 32
Wire Temp. Abbreviations - CORRECT ANSWER - No H = 60° C
1 H = 75°C
2 H= 90°
Voltage is _________ to the # of turns - CORRECT ANSWER - Proportional
To select the proper fuse, it is necessary to know the... - CORRECT ANSWER
- voltage and amperage
When under ordinary conditions, device boxes for concealed work shall have a
depth of not less than... - CORRECT ANSWER - 1/2"
The largest size conductor that may be used in under floor raceway is... -
CORRECT ANSWER - that for which it is designed for
A 277V light circuit may not be used to supply... - CORRECT ANSWER - A
standard medium base
To determine the insulation resistance of a newly installed wiring system, best
procedure is t megger test... - CORRECT ANSWER - between the wires and
from each wire to the conduit
