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