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NYC Health + Hospitals Supervising
Electrician Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary responsibility of a supervising electrician on a hospital
electrical project?
A. Perform only routine lighting repairs
B. Direct, supervise, and ensure electrical work is performed safely and in
accordance with applicable requirements
C. Operate medical equipment
D. Inspect plumbing installations
Answer: Direct, supervise, and ensure electrical work is performed safely and in
accordance with applicable requirements
Rationale: A supervising electrician is responsible for directing electrical work,
maintaining safe work practices, coordinating personnel, and ensuring
installations comply with applicable electrical, building, fire, and safety
requirements.
2. Which electrical quantity is measured in volts?
A. Current
B. Resistance
,C. Voltage
D. Power
Answer: Voltage
Rationale: Voltage is the electrical potential difference between two points and
is measured in volts.
3. What is the basic relationship between voltage, current, and resistance?
A. V = I/R
B. I = V × R
C. V = I × R
D. R = V × I
Answer: V = I × R
Rationale: Ohm's law states that voltage equals current multiplied by
resistance.
4. A 120-volt circuit has a resistance of 24 ohms. Approximately how much
current flows?
A. 2 A
B. 5 A
C. 24 A
D. 120 A
Answer: 5 A
Rationale: Using I = V/R, 120 ÷ 24 = 5 amperes.
5. What is the purpose of a circuit breaker?
A. Increase circuit voltage
B. Improve power factor
C. Protect conductors and equipment from overcurrent conditions
D. Reduce grounding requirements
,Answer: Protect conductors and equipment from overcurrent conditions
Rationale: Circuit breakers are overcurrent protective devices designed to open
a circuit when excessive current occurs.
6. What is the main purpose of grounding electrical equipment?
A. Increase operating voltage
B. Reduce conductor size
C. Provide a low-impedance path for fault current and help facilitate operation of
protective devices
D. Eliminate all electrical hazards
Answer: Provide a low-impedance path for fault current and help facilitate
operation of protective devices
Rationale: Equipment grounding provides a conductive path for fault current so
protective devices can operate promptly and disconnect the faulted circuit.
7. What is bonding?
A. Increasing resistance
B. Connecting conductive parts together to establish electrical continuity
C. Increasing voltage
D. Installing additional fuses
Answer: Connecting conductive parts together to establish electrical continuity
Rationale: Bonding connects normally non-current-carrying conductive parts so
they remain at substantially the same electrical potential and provide an
effective fault-current path.
8. Which device is specifically designed to detect certain ground-fault currents
and quickly interrupt power?
A. Transformer
B. Contactor
, C. Ground-fault circuit interrupter (GFCI)
D. Disconnect switch only
Answer: Ground-fault circuit interrupter (GFCI)
Rationale: A GFCI monitors current imbalance and disconnects the circuit when a
qualifying ground-fault condition is detected.
9. What is the purpose of a disconnecting means?
A. Increase available fault current
B. Provide a means to disconnect electrical equipment or circuits from their
source of power
C. Reduce conductor ampacity
D. Replace grounding conductors
Answer: Provide a means to disconnect electrical equipment or circuits from
their source of power
Rationale: Disconnecting means allow equipment or circuits to be isolated from
their electrical supply for operation, servicing, or maintenance as required.
10.What does the term "ampacity" mean?
A. Maximum voltage of a conductor
B. Resistance of a conductor
C. Maximum current a conductor can carry continuously under specified
conditions without exceeding its temperature rating
D. Maximum fault voltage
Answer: Maximum current a conductor can carry continuously under specified
conditions without exceeding its temperature rating
Rationale: Ampacity is determined by conductor characteristics, insulation
temperature rating, installation conditions, ambient temperature, and other
applicable factors.
NYC Health + Hospitals Supervising
Electrician Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary responsibility of a supervising electrician on a hospital
electrical project?
A. Perform only routine lighting repairs
B. Direct, supervise, and ensure electrical work is performed safely and in
accordance with applicable requirements
C. Operate medical equipment
D. Inspect plumbing installations
Answer: Direct, supervise, and ensure electrical work is performed safely and in
accordance with applicable requirements
Rationale: A supervising electrician is responsible for directing electrical work,
maintaining safe work practices, coordinating personnel, and ensuring
installations comply with applicable electrical, building, fire, and safety
requirements.
2. Which electrical quantity is measured in volts?
A. Current
B. Resistance
,C. Voltage
D. Power
Answer: Voltage
Rationale: Voltage is the electrical potential difference between two points and
is measured in volts.
3. What is the basic relationship between voltage, current, and resistance?
A. V = I/R
B. I = V × R
C. V = I × R
D. R = V × I
Answer: V = I × R
Rationale: Ohm's law states that voltage equals current multiplied by
resistance.
4. A 120-volt circuit has a resistance of 24 ohms. Approximately how much
current flows?
A. 2 A
B. 5 A
C. 24 A
D. 120 A
Answer: 5 A
Rationale: Using I = V/R, 120 ÷ 24 = 5 amperes.
5. What is the purpose of a circuit breaker?
A. Increase circuit voltage
B. Improve power factor
C. Protect conductors and equipment from overcurrent conditions
D. Reduce grounding requirements
,Answer: Protect conductors and equipment from overcurrent conditions
Rationale: Circuit breakers are overcurrent protective devices designed to open
a circuit when excessive current occurs.
6. What is the main purpose of grounding electrical equipment?
A. Increase operating voltage
B. Reduce conductor size
C. Provide a low-impedance path for fault current and help facilitate operation of
protective devices
D. Eliminate all electrical hazards
Answer: Provide a low-impedance path for fault current and help facilitate
operation of protective devices
Rationale: Equipment grounding provides a conductive path for fault current so
protective devices can operate promptly and disconnect the faulted circuit.
7. What is bonding?
A. Increasing resistance
B. Connecting conductive parts together to establish electrical continuity
C. Increasing voltage
D. Installing additional fuses
Answer: Connecting conductive parts together to establish electrical continuity
Rationale: Bonding connects normally non-current-carrying conductive parts so
they remain at substantially the same electrical potential and provide an
effective fault-current path.
8. Which device is specifically designed to detect certain ground-fault currents
and quickly interrupt power?
A. Transformer
B. Contactor
, C. Ground-fault circuit interrupter (GFCI)
D. Disconnect switch only
Answer: Ground-fault circuit interrupter (GFCI)
Rationale: A GFCI monitors current imbalance and disconnects the circuit when a
qualifying ground-fault condition is detected.
9. What is the purpose of a disconnecting means?
A. Increase available fault current
B. Provide a means to disconnect electrical equipment or circuits from their
source of power
C. Reduce conductor ampacity
D. Replace grounding conductors
Answer: Provide a means to disconnect electrical equipment or circuits from
their source of power
Rationale: Disconnecting means allow equipment or circuits to be isolated from
their electrical supply for operation, servicing, or maintenance as required.
10.What does the term "ampacity" mean?
A. Maximum voltage of a conductor
B. Resistance of a conductor
C. Maximum current a conductor can carry continuously under specified
conditions without exceeding its temperature rating
D. Maximum fault voltage
Answer: Maximum current a conductor can carry continuously under specified
conditions without exceeding its temperature rating
Rationale: Ampacity is determined by conductor characteristics, insulation
temperature rating, installation conditions, ambient temperature, and other
applicable factors.
