NYC Health Hospitals Electrician Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A hospital electrician is assigned to install a new 120/208-volt branch
circuit supplying receptacles in a patient care area of a newly
renovated medical-surgical unit within an NYC Health + Hospitals
facility. Before energizing the circuit, the electrician must verify that all
wiring methods, grounding, and receptacle installation comply with
applicable electrical safety requirements. Which installation practice
provides the highest level of compliance and patient protection?
A. Install standard commercial-grade receptacles without redundant
grounding.
B. Use residential-grade receptacles because they are less expensive.
C. Install hospital-grade receptacles connected to an effective equipment
grounding system and verify grounding integrity through testing before the
circuit is placed into service.
,D. Eliminate the equipment grounding conductor if metallic conduit is
installed.
Rationale: Patient care areas require hospital-grade wiring devices and a
reliable equipment grounding system to reduce shock hazards. Verifying
grounding continuity before energization ensures patient and staff safety
while meeting electrical code requirements for healthcare facilities.
2. While troubleshooting a motor starter controlling an air-handling unit
in a hospital, an electrician discovers that the overload relay has
tripped repeatedly even though the motor appears mechanically free.
Which condition is the most likely electrical cause of repeated
overload relay operation?
A. Low voltage causing the motor to draw excessive current while
attempting to maintain torque.
B. Excessive room lighting.
C. Oversized conduit.
D. Grounded equipment enclosure.
Rationale: Low supply voltage causes induction motors to draw higher
current to produce the required torque, resulting in overheating and
overload relay trips. Proper voltage verification is an essential
troubleshooting step.
3. Before replacing a defective molded-case circuit breaker in an
energized distribution panel, what is the safest procedure?
,A. Wear safety glasses only.
B. Replace the breaker while standing on a dry floor.
C. Ask another employee to observe the work.
D. De-energize the equipment whenever possible, apply lockout/tagout
procedures, verify the absence of voltage with an approved tester, and
wear appropriate PPE before beginning work.
Rationale: Lockout/tagout, verification of zero energy, and appropriate
PPE form the foundation of electrical safety. Working on de-energized
equipment is always preferred unless energized work is specifically
justified.
4. An electrician measures 277 volts from phase to neutral but measures
zero volts between the neutral conductor and equipment ground at
the service disconnect. What does this indicate?
A. The neutral is open.
B. The phase conductor is grounded.
C. The grounded conductor and equipment grounding system are properly
bonded at the service equipment.
D. The transformer secondary is open.
Rationale: The grounded conductor is intentionally bonded to the
equipment grounding system at the service disconnecting means, resulting
in little or no voltage difference between neutral and ground under normal
conditions.
, 5. A hospital emergency generator starts automatically following a utility
power outage but several life safety branch circuits remain de-
energized. Which component should be inspected first?
A. Lighting contactors.
B. Automatic transfer switch serving the affected branch.
C. Smoke detector batteries.
D. Exit signs.
Rationale: The automatic transfer switch transfers essential loads from the
normal source to the emergency source. A malfunctioning transfer switch
can prevent emergency circuits from receiving generator power.
6. When using a digital multimeter to measure resistance in a circuit, the
circuit should be:
A. Energized.
B. Operating at full load.
C. Connected to a battery charger.
D. Completely de-energized and isolated from all power sources.
Rationale: Resistance measurements require the absence of voltage.
Measuring resistance on an energized circuit can damage the meter and
create a safety hazard.
7. A transformer has a primary voltage of 480 volts and a secondary
voltage of 120 volts. What is its turns ratio?
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A hospital electrician is assigned to install a new 120/208-volt branch
circuit supplying receptacles in a patient care area of a newly
renovated medical-surgical unit within an NYC Health + Hospitals
facility. Before energizing the circuit, the electrician must verify that all
wiring methods, grounding, and receptacle installation comply with
applicable electrical safety requirements. Which installation practice
provides the highest level of compliance and patient protection?
A. Install standard commercial-grade receptacles without redundant
grounding.
B. Use residential-grade receptacles because they are less expensive.
C. Install hospital-grade receptacles connected to an effective equipment
grounding system and verify grounding integrity through testing before the
circuit is placed into service.
,D. Eliminate the equipment grounding conductor if metallic conduit is
installed.
Rationale: Patient care areas require hospital-grade wiring devices and a
reliable equipment grounding system to reduce shock hazards. Verifying
grounding continuity before energization ensures patient and staff safety
while meeting electrical code requirements for healthcare facilities.
2. While troubleshooting a motor starter controlling an air-handling unit
in a hospital, an electrician discovers that the overload relay has
tripped repeatedly even though the motor appears mechanically free.
Which condition is the most likely electrical cause of repeated
overload relay operation?
A. Low voltage causing the motor to draw excessive current while
attempting to maintain torque.
B. Excessive room lighting.
C. Oversized conduit.
D. Grounded equipment enclosure.
Rationale: Low supply voltage causes induction motors to draw higher
current to produce the required torque, resulting in overheating and
overload relay trips. Proper voltage verification is an essential
troubleshooting step.
3. Before replacing a defective molded-case circuit breaker in an
energized distribution panel, what is the safest procedure?
,A. Wear safety glasses only.
B. Replace the breaker while standing on a dry floor.
C. Ask another employee to observe the work.
D. De-energize the equipment whenever possible, apply lockout/tagout
procedures, verify the absence of voltage with an approved tester, and
wear appropriate PPE before beginning work.
Rationale: Lockout/tagout, verification of zero energy, and appropriate
PPE form the foundation of electrical safety. Working on de-energized
equipment is always preferred unless energized work is specifically
justified.
4. An electrician measures 277 volts from phase to neutral but measures
zero volts between the neutral conductor and equipment ground at
the service disconnect. What does this indicate?
A. The neutral is open.
B. The phase conductor is grounded.
C. The grounded conductor and equipment grounding system are properly
bonded at the service equipment.
D. The transformer secondary is open.
Rationale: The grounded conductor is intentionally bonded to the
equipment grounding system at the service disconnecting means, resulting
in little or no voltage difference between neutral and ground under normal
conditions.
, 5. A hospital emergency generator starts automatically following a utility
power outage but several life safety branch circuits remain de-
energized. Which component should be inspected first?
A. Lighting contactors.
B. Automatic transfer switch serving the affected branch.
C. Smoke detector batteries.
D. Exit signs.
Rationale: The automatic transfer switch transfers essential loads from the
normal source to the emergency source. A malfunctioning transfer switch
can prevent emergency circuits from receiving generator power.
6. When using a digital multimeter to measure resistance in a circuit, the
circuit should be:
A. Energized.
B. Operating at full load.
C. Connected to a battery charger.
D. Completely de-energized and isolated from all power sources.
Rationale: Resistance measurements require the absence of voltage.
Measuring resistance on an energized circuit can damage the meter and
create a safety hazard.
7. A transformer has a primary voltage of 480 volts and a secondary
voltage of 120 volts. What is its turns ratio?
