NYC Health Hospitals Electrician Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. Which of the following is the primary purpose of a circuit breaker?
A. To increase voltage
B. To convert AC to DC
C. To protect electrical circuits from overload
D. To regulate current flow
Rationale: Circuit breakers automatically interrupt current flow when a
circuit is overloaded or a short circuit occurs, preventing damage and
fire hazards.
2. The color green or green with yellow stripes on a wire indicates:
A. Hot wire
B. Neutral wire
C. Ground wire
D. Live wire
Rationale: Ground wires are typically green or green with yellow stripes,
providing a safe path for electricity to prevent shocks.
, 3. Ohm’s Law is expressed as:
A. V = I × P
B. V = I × R
C. I = V × R
D. P = V × I × R
Rationale: Ohm’s Law defines the relationship between voltage (V),
current (I), and resistance (R): V = I × R.
4. Which type of conduit is most suitable for wet locations?
A. EMT
B. PVC
C. RMC
D. FMC
Rationale: PVC conduit is non-metallic, corrosion-resistant, and suitable
for wet or damp locations.
5. The main function of a transformer is to:
A. Store electrical energy
B. Change voltage levels
C. Convert AC to DC
D. Protect circuits from overload
Rationale: Transformers adjust voltage levels either up or down,
enabling safe transmission and distribution of electricity.
, 6. A fuse must be replaced with one of:
A. Higher voltage rating
B. Higher current rating
C. Lower current rating
D. The same current rating
Rationale: Using a fuse with the correct current rating ensures proper
protection; a higher rating may fail to protect the circuit.
7. In a three-phase system, the phase difference between each line
is:
A. 90°
B. 180°
C. 120°
D. 60°
Rationale: Three-phase power has lines separated by 120°, providing
balanced power delivery and efficient operation of motors.
8. The National Electrical Code (NEC) requires that all outlets in
bathrooms be:
A. Standard outlets
B. GFCI protected
C. High-voltage outlets
D. Unprotected
, Rationale: GFCI (Ground Fault Circuit Interrupter) outlets prevent
electric shock in wet areas, such as bathrooms.
9. Which device converts alternating current (AC) to direct current
(DC)?
A. Transformer
B. Circuit breaker
C. Rectifier
D. Inverter
Rationale: A rectifier allows current to flow in one direction only,
converting AC to DC.
10. The proper wire size for a 20-amp circuit in residential wiring
is typically:
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
Rationale: According to NEC guidelines, 12 AWG copper wire safely
carries up to 20 amps.
11. A short circuit is caused when:
A. A wire is disconnected
B. Current flows normally
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following is the primary purpose of a circuit breaker?
A. To increase voltage
B. To convert AC to DC
C. To protect electrical circuits from overload
D. To regulate current flow
Rationale: Circuit breakers automatically interrupt current flow when a
circuit is overloaded or a short circuit occurs, preventing damage and
fire hazards.
2. The color green or green with yellow stripes on a wire indicates:
A. Hot wire
B. Neutral wire
C. Ground wire
D. Live wire
Rationale: Ground wires are typically green or green with yellow stripes,
providing a safe path for electricity to prevent shocks.
, 3. Ohm’s Law is expressed as:
A. V = I × P
B. V = I × R
C. I = V × R
D. P = V × I × R
Rationale: Ohm’s Law defines the relationship between voltage (V),
current (I), and resistance (R): V = I × R.
4. Which type of conduit is most suitable for wet locations?
A. EMT
B. PVC
C. RMC
D. FMC
Rationale: PVC conduit is non-metallic, corrosion-resistant, and suitable
for wet or damp locations.
5. The main function of a transformer is to:
A. Store electrical energy
B. Change voltage levels
C. Convert AC to DC
D. Protect circuits from overload
Rationale: Transformers adjust voltage levels either up or down,
enabling safe transmission and distribution of electricity.
, 6. A fuse must be replaced with one of:
A. Higher voltage rating
B. Higher current rating
C. Lower current rating
D. The same current rating
Rationale: Using a fuse with the correct current rating ensures proper
protection; a higher rating may fail to protect the circuit.
7. In a three-phase system, the phase difference between each line
is:
A. 90°
B. 180°
C. 120°
D. 60°
Rationale: Three-phase power has lines separated by 120°, providing
balanced power delivery and efficient operation of motors.
8. The National Electrical Code (NEC) requires that all outlets in
bathrooms be:
A. Standard outlets
B. GFCI protected
C. High-voltage outlets
D. Unprotected
, Rationale: GFCI (Ground Fault Circuit Interrupter) outlets prevent
electric shock in wet areas, such as bathrooms.
9. Which device converts alternating current (AC) to direct current
(DC)?
A. Transformer
B. Circuit breaker
C. Rectifier
D. Inverter
Rationale: A rectifier allows current to flow in one direction only,
converting AC to DC.
10. The proper wire size for a 20-amp circuit in residential wiring
is typically:
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
Rationale: According to NEC guidelines, 12 AWG copper wire safely
carries up to 20 amps.
11. A short circuit is caused when:
A. A wire is disconnected
B. Current flows normally
