NYC Electrician (NYC H+H) Exam Practice
Questions and Verified Answers with Rationales
2026–2027 | Complete 100 Q&A Study Guide |
Instant Download PDF
Question 1
What is the primary purpose of grounding in an electrical system?
A. Increase voltage
B. Reduce current flow
C. Provide a safe path for fault current
D. Improve lighting efficiency
Correct Answer: C. Provide a safe path for fault current
Rationale: Grounding protects people and equipment by directing fault current safely to
earth, reducing the risk of electric shock and fire.
Question 2
Before beginning electrical work on energized equipment, an electrician should first:
A. Wear rubber gloves only
B. Lockout and tagout the equipment
C. Remove all circuit breakers
D. Disconnect the neutral conductor
Correct Answer: B. Lockout and tagout the equipment
Rationale: Lockout/Tagout (LOTO) procedures prevent accidental energization during
maintenance and repair activities.
Question 3
According to electrical safety standards, voltage above _____ is generally considered
hazardous.
A. 12 volts
B. 24 volts
C. 50 volts
D. 75 volts
,Correct Answer: C. 50 volts
Rationale: Voltages above 50 volts can present a significant shock hazard under many
conditions.
Question 4
Which instrument is used to measure electrical resistance?
A. Ammeter
B. Voltmeter
C. Wattmeter
D. Ohmmeter
Correct Answer: D. Ohmmeter
Rationale: An ohmmeter measures resistance in ohms and is commonly incorporated into a
multimeter.
Question 5
The unit of electrical power is:
A. Volt
B. Ohm
C. Watt
D. Ampere
Correct Answer: C. Watt
Rationale: Power is measured in watts and equals voltage multiplied by current.
Question 6
What color is commonly used to identify grounding conductors?
A. Red
B. White
C. Green
D. Black
Correct Answer: C. Green
Rationale: Green or bare conductors are typically designated as equipment grounding
conductors.
, Question 7
A circuit breaker primarily protects against:
A. Low voltage
B. Overcurrent conditions
C. Ground moisture
D. Power factor loss
Correct Answer: B. Overcurrent conditions
Rationale: Circuit breakers interrupt current flow when overloads or short circuits occur.
Question 8
What does GFCI stand for?
A. Ground Fault Circuit Interrupter
B. General Fault Current Indicator
C. Ground Function Circuit Integrator
D. General Fuse Control Interface
Correct Answer: A. Ground Fault Circuit Interrupter
Rationale: GFCIs quickly disconnect power when a ground fault is detected.
Question 9
The formula for electrical power is:
A. P = V × I
B. P = V ÷ I
C. P = I ÷ R
D. P = R × T
Correct Answer: A. P = V × I
Rationale: Power equals voltage multiplied by current.
Question 10
What is the purpose of conduit?
A. Increase current flow
B. Protect electrical conductors
Questions and Verified Answers with Rationales
2026–2027 | Complete 100 Q&A Study Guide |
Instant Download PDF
Question 1
What is the primary purpose of grounding in an electrical system?
A. Increase voltage
B. Reduce current flow
C. Provide a safe path for fault current
D. Improve lighting efficiency
Correct Answer: C. Provide a safe path for fault current
Rationale: Grounding protects people and equipment by directing fault current safely to
earth, reducing the risk of electric shock and fire.
Question 2
Before beginning electrical work on energized equipment, an electrician should first:
A. Wear rubber gloves only
B. Lockout and tagout the equipment
C. Remove all circuit breakers
D. Disconnect the neutral conductor
Correct Answer: B. Lockout and tagout the equipment
Rationale: Lockout/Tagout (LOTO) procedures prevent accidental energization during
maintenance and repair activities.
Question 3
According to electrical safety standards, voltage above _____ is generally considered
hazardous.
A. 12 volts
B. 24 volts
C. 50 volts
D. 75 volts
,Correct Answer: C. 50 volts
Rationale: Voltages above 50 volts can present a significant shock hazard under many
conditions.
Question 4
Which instrument is used to measure electrical resistance?
A. Ammeter
B. Voltmeter
C. Wattmeter
D. Ohmmeter
Correct Answer: D. Ohmmeter
Rationale: An ohmmeter measures resistance in ohms and is commonly incorporated into a
multimeter.
Question 5
The unit of electrical power is:
A. Volt
B. Ohm
C. Watt
D. Ampere
Correct Answer: C. Watt
Rationale: Power is measured in watts and equals voltage multiplied by current.
Question 6
What color is commonly used to identify grounding conductors?
A. Red
B. White
C. Green
D. Black
Correct Answer: C. Green
Rationale: Green or bare conductors are typically designated as equipment grounding
conductors.
, Question 7
A circuit breaker primarily protects against:
A. Low voltage
B. Overcurrent conditions
C. Ground moisture
D. Power factor loss
Correct Answer: B. Overcurrent conditions
Rationale: Circuit breakers interrupt current flow when overloads or short circuits occur.
Question 8
What does GFCI stand for?
A. Ground Fault Circuit Interrupter
B. General Fault Current Indicator
C. Ground Function Circuit Integrator
D. General Fuse Control Interface
Correct Answer: A. Ground Fault Circuit Interrupter
Rationale: GFCIs quickly disconnect power when a ground fault is detected.
Question 9
The formula for electrical power is:
A. P = V × I
B. P = V ÷ I
C. P = I ÷ R
D. P = R × T
Correct Answer: A. P = V × I
Rationale: Power equals voltage multiplied by current.
Question 10
What is the purpose of conduit?
A. Increase current flow
B. Protect electrical conductors
