NYC Electrician (CUNY) Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026-2027 Q&A | Instant Download
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1. Which of the following is the primary purpose of the National
Electrical Code (NEC)?
a) To increase electricity costs
b) To regulate electric utility rates
c) To ensure electrical safety
d) To promote renewable energy only
The NEC sets standards to protect people and property from
electrical hazards.
2. What color is typically used for a grounding conductor in
residential wiring?
a) Red
b) Blue
c) Black
d) Green
Ground wires are green (or bare) to identify them clearly for safety
purposes.
3. Which device is designed to protect people from electric shock?
a) Circuit breaker
b) Ground Fault Circuit Interrupter (GFCI)
c) Transformer
, d) Contactor
GFCIs detect current leaks to ground and quickly shut off power to
prevent shock.
4. What does a circuit breaker do?
a) Stores electricity
b) Interrupts current flow during overload or short circuit
c) Reduces voltage
d) Converts AC to DC
Circuit breakers prevent overheating and potential fires by
interrupting excessive current.
5. In a three-phase system, how many hot wires are typically used?
a) One
b) Two
c) Three
d) Four
Three-phase systems use three hot conductors, each carrying
current 120° out of phase.
6. What is the standard voltage for most residential outlets in NYC?
a) 120/208 V
b) 120 V
c) 240 V
d) 277 V
Most household outlets provide 120 volts for standard appliances.
7. Which type of wire is suitable for wet locations?
a) NM-B
b) THWN
c) UF-B
, d) SE
THWN conductors are rated for wet environments and high
temperatures.
8. What is the main purpose of a conduit?
a) To increase current
b) To store electrical devices
c) To protect and route electrical wiring
d) To convert AC to DC
Conduits shield wires from physical damage and organize
electrical distribution.
9. Which meter is used to measure current in a conductor without
disconnecting it?
a) Voltmeter
b) Ohmmeter
c) Clamp meter
d) Megger
Clamp meters measure current magnetically without breaking the
circuit.
10. What is the minimum height for a service disconnect on the
outside of a building?
a) 4 feet
b) 5 feet
c) 6 feet 6 inches
d) 8 feet
NEC requires 6’6” minimum to allow safe access to service
disconnects.
Correct Answers (Verified Answers) Plus
Rationales 2026-2027 Q&A | Instant Download
1. Which of the following is the primary purpose of the National
Electrical Code (NEC)?
a) To increase electricity costs
b) To regulate electric utility rates
c) To ensure electrical safety
d) To promote renewable energy only
The NEC sets standards to protect people and property from
electrical hazards.
2. What color is typically used for a grounding conductor in
residential wiring?
a) Red
b) Blue
c) Black
d) Green
Ground wires are green (or bare) to identify them clearly for safety
purposes.
3. Which device is designed to protect people from electric shock?
a) Circuit breaker
b) Ground Fault Circuit Interrupter (GFCI)
c) Transformer
, d) Contactor
GFCIs detect current leaks to ground and quickly shut off power to
prevent shock.
4. What does a circuit breaker do?
a) Stores electricity
b) Interrupts current flow during overload or short circuit
c) Reduces voltage
d) Converts AC to DC
Circuit breakers prevent overheating and potential fires by
interrupting excessive current.
5. In a three-phase system, how many hot wires are typically used?
a) One
b) Two
c) Three
d) Four
Three-phase systems use three hot conductors, each carrying
current 120° out of phase.
6. What is the standard voltage for most residential outlets in NYC?
a) 120/208 V
b) 120 V
c) 240 V
d) 277 V
Most household outlets provide 120 volts for standard appliances.
7. Which type of wire is suitable for wet locations?
a) NM-B
b) THWN
c) UF-B
, d) SE
THWN conductors are rated for wet environments and high
temperatures.
8. What is the main purpose of a conduit?
a) To increase current
b) To store electrical devices
c) To protect and route electrical wiring
d) To convert AC to DC
Conduits shield wires from physical damage and organize
electrical distribution.
9. Which meter is used to measure current in a conductor without
disconnecting it?
a) Voltmeter
b) Ohmmeter
c) Clamp meter
d) Megger
Clamp meters measure current magnetically without breaking the
circuit.
10. What is the minimum height for a service disconnect on the
outside of a building?
a) 4 feet
b) 5 feet
c) 6 feet 6 inches
d) 8 feet
NEC requires 6’6” minimum to allow safe access to service
disconnects.
