NYC ELECTRICIAN (NYC H+H) EXAM AND
PRACTICE EXAM NEWEST 2026/ 2027 TEST BANK
EXAM PREP WITH COMPLETE 300 REAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (MOST RECENT!!)
During troubleshooting in a hospital mechanical room, a motor starter
repeatedly trips its overload shortly after startup. The measured line
voltage is normal, but one phase has significantly higher current than the
other two. Which condition is most likely?
A. Open control fuse
B. Excessive grounding resistance
C. Single-phasing or phase imbalance
D. Incorrect auxiliary-contact arrangement - Correct Answer - C
Unequal phase currents with normal supply voltage strongly suggest
phase imbalance or loss of a phase.
An electrician is preparing to service an energized-looking disconnect
feeding hospital equipment. The upstream breaker is open. What is the
most appropriate action before beginning work?
A. Confirm the breaker handle is mechanically locked
B. Test the circuit with an approved voltage tester
C. Check the equipment nameplate for operating voltage
D. Inspect the disconnect enclosure for visible damage - Correct Answer
-B
pg. 1
,De-energization must be verified with appropriate test equipment before
work begins.
A technician measures 120 V from each ungrounded conductor to
ground but measures approximately 0 V between the two ungrounded
conductors on a circuit expected to be 240 V. What is the most likely
explanation?
A. The two conductors are on the same phase
B. The grounding conductor is undersized
C. The neutral conductor is open
D. The supply transformer is overloaded - Correct Answer - A
Two 120 V conductors on the same phase have little or no potential
difference between them.
A hospital emergency generator starts after normal utility power is lost.
The generator reaches rated voltage and frequency, but the automatic
transfer switch does not transfer the load. Which component should be
investigated first?
A. Generator fuel filter
B. Transfer-switch control circuit
C. Building grounding electrode
D. Motor starter overload - Correct Answer - B
If the generator reaches acceptable voltage and frequency but the load
does not transfer, ATS sensing/control circuitry is a logical
troubleshooting point.
pg. 2
,A three-phase motor rotates opposite the desired direction immediately
after replacement. The motor and supply voltages are correct. What is
the standard corrective procedure?
A. Increase the overload setting
B. Reverse two phase conductors
C. Replace the grounding conductor
D. Increase the control-circuit voltage - Correct Answer - B
Interchanging any two phases reverses the rotating magnetic field and
motor rotation.
While testing a receptacle, an electrician finds approximately 120 V hot-
to-neutral, 120 V hot-to-ground, and nearly 0 V neutral-to-ground.
Which condition does this normally indicate?
A. Correct polarity and normal grounding relationship
B. Open equipment grounding conductor
C. Reversed neutral and equipment grounding conductor
D. Open grounded conductor - Correct Answer - A
Those readings are consistent with a normally wired 120 V receptacle.
A transformer has a 480 V primary and a 120 V secondary. If the
primary has 600 turns, approximately how many turns are on the
secondary?
A. 75
B. 120
pg. 3
, C. 150
D. 240 - Correct Answer - C
\(V_p/V_s=N_p/N_s\).
\(480/120=600/N_s\), giving \(N_s=150\).
A hospital motor operates normally for several hours but begins
overheating after its ventilation openings become partially blocked.
Current measurements remain within the nameplate range. What is the
most likely cause?
A. Excessive line-to-line voltage
B. Insufficient heat dissipation
C. Reversed motor rotation
D. Excessive control-circuit resistance - Correct Answer - B
Restricted ventilation can cause overheating even when operating
current remains normal.
A facility's emergency transfer switch remains connected to the normal
source after utility power has failed. Generator voltage and frequency
are within acceptable operating ranges. Which signal is most relevant to
investigate?
A. Normal-source sensing circuit
B. Motor overload circuit
C. Lighting dimmer circuit
D. Equipment grounding conductor - Correct Answer - A
pg. 4
PRACTICE EXAM NEWEST 2026/ 2027 TEST BANK
EXAM PREP WITH COMPLETE 300 REAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (MOST RECENT!!)
During troubleshooting in a hospital mechanical room, a motor starter
repeatedly trips its overload shortly after startup. The measured line
voltage is normal, but one phase has significantly higher current than the
other two. Which condition is most likely?
A. Open control fuse
B. Excessive grounding resistance
C. Single-phasing or phase imbalance
D. Incorrect auxiliary-contact arrangement - Correct Answer - C
Unequal phase currents with normal supply voltage strongly suggest
phase imbalance or loss of a phase.
An electrician is preparing to service an energized-looking disconnect
feeding hospital equipment. The upstream breaker is open. What is the
most appropriate action before beginning work?
A. Confirm the breaker handle is mechanically locked
B. Test the circuit with an approved voltage tester
C. Check the equipment nameplate for operating voltage
D. Inspect the disconnect enclosure for visible damage - Correct Answer
-B
pg. 1
,De-energization must be verified with appropriate test equipment before
work begins.
A technician measures 120 V from each ungrounded conductor to
ground but measures approximately 0 V between the two ungrounded
conductors on a circuit expected to be 240 V. What is the most likely
explanation?
A. The two conductors are on the same phase
B. The grounding conductor is undersized
C. The neutral conductor is open
D. The supply transformer is overloaded - Correct Answer - A
Two 120 V conductors on the same phase have little or no potential
difference between them.
A hospital emergency generator starts after normal utility power is lost.
The generator reaches rated voltage and frequency, but the automatic
transfer switch does not transfer the load. Which component should be
investigated first?
A. Generator fuel filter
B. Transfer-switch control circuit
C. Building grounding electrode
D. Motor starter overload - Correct Answer - B
If the generator reaches acceptable voltage and frequency but the load
does not transfer, ATS sensing/control circuitry is a logical
troubleshooting point.
pg. 2
,A three-phase motor rotates opposite the desired direction immediately
after replacement. The motor and supply voltages are correct. What is
the standard corrective procedure?
A. Increase the overload setting
B. Reverse two phase conductors
C. Replace the grounding conductor
D. Increase the control-circuit voltage - Correct Answer - B
Interchanging any two phases reverses the rotating magnetic field and
motor rotation.
While testing a receptacle, an electrician finds approximately 120 V hot-
to-neutral, 120 V hot-to-ground, and nearly 0 V neutral-to-ground.
Which condition does this normally indicate?
A. Correct polarity and normal grounding relationship
B. Open equipment grounding conductor
C. Reversed neutral and equipment grounding conductor
D. Open grounded conductor - Correct Answer - A
Those readings are consistent with a normally wired 120 V receptacle.
A transformer has a 480 V primary and a 120 V secondary. If the
primary has 600 turns, approximately how many turns are on the
secondary?
A. 75
B. 120
pg. 3
, C. 150
D. 240 - Correct Answer - C
\(V_p/V_s=N_p/N_s\).
\(480/120=600/N_s\), giving \(N_s=150\).
A hospital motor operates normally for several hours but begins
overheating after its ventilation openings become partially blocked.
Current measurements remain within the nameplate range. What is the
most likely cause?
A. Excessive line-to-line voltage
B. Insufficient heat dissipation
C. Reversed motor rotation
D. Excessive control-circuit resistance - Correct Answer - B
Restricted ventilation can cause overheating even when operating
current remains normal.
A facility's emergency transfer switch remains connected to the normal
source after utility power has failed. Generator voltage and frequency
are within acceptable operating ranges. Which signal is most relevant to
investigate?
A. Normal-source sensing circuit
B. Motor overload circuit
C. Lighting dimmer circuit
D. Equipment grounding conductor - Correct Answer - A
pg. 4
