NYC ELECTRICIAN (CUNY) EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE | EXAM PREP |
STUDY GUIDE | PRACTICE TEST
CORE DOMAINS
1. Repair, Installation, and Maintenance of Electrical Systems
2. Single-Phase and Three-Phase Electricity
3. AC/DC Circuits, Motors, and Control Systems
4. Electrical Safety and Safe Work Practices
5. Electrical Drawings, Schematics, Blueprints, and Specifications
6. Electrical Calculations, Measuring Instruments, and Meters
7. NYC Electrical Code and Installation Requirements
8. Fire Alarm, Communications, Lighting, Heat, and Power Systems
9. Tools, Materials, Conduit, Raceways, and Wiring Methods
10. Supervision, Planning, Administrative Duties, and Professional Ethics
INTRODUCTION
The NYC Electrician (CUNY) examination evaluates the knowledge and abilities needed to install,
maintain, repair, test, and troubleshoot electrical systems in CUNY facilities. The official
examination areas include repair, installation and maintenance, safety, interpretation and
revision of drawings, supervising, and administrative duties, with coverage extending to AC/DC
circuits, electrical calculations, control systems, wiring methods, meters, the NYC Electrical
Code, and professional conduct. This practice test is designed to strengthen both technical
knowledge and practical judgment. Scenario-based questions require candidates to apply
principles to realistic electrical work situations, making understanding and sound decision-
making more valuable than memorizing isolated facts.
SECTION ONE
QUESTIONS 1–50
1. An electrician is preparing to work on a branch circuit that supplies several receptacles.
Before beginning the repair, which action provides the most important initial protection
against accidental energization?
,A. Place a warning sign near the nearest receptacle
B. Remove the receptacle cover plate
C. De-energize the circuit and verify the absence of voltage with an appropriate tester
D. Ask another worker whether the circuit is normally energized
Rationale: De-energizing and testing establish that the conductors are actually dead before work
begins. A switch or breaker position alone is not sufficient because circuits can be mislabeled,
backfed, or otherwise energized unexpectedly.
2. Which instrument is most appropriate for measuring the voltage between two energized
conductors?
A. Voltmeter
B. Clamp-on ammeter
C. Megohmmeter
D. Continuity tester
Rationale: A voltmeter measures electrical potential difference between two points. An ammeter
measures current, while insulation and continuity instruments serve different testing purposes.
3. In a balanced three-phase system, the three phase conductors are separated electrically
by approximately what angular displacement?
A. 60 degrees
B. 90 degrees
C. 120 degrees
D. 120 degrees
Rationale: The three phases of a balanced three-phase system are displaced by 120 electrical
degrees from one another. This phase relationship allows efficient transmission and operation of
three-phase equipment.
4. A motor repeatedly trips its overload protection shortly after starting. The motor is not
mechanically jammed. Which condition should be investigated first?
A. The color of the motor enclosure
B. Excessive current caused by an electrical or load-related problem
C. The length of the grounding electrode conductor
D. The position of the disconnect handle
Rationale: Repeated overload operation indicates that the motor is drawing excessive current or
experiencing an abnormal load condition. Voltage, connections, motor condition, and
mechanical loading should be investigated before repeatedly resetting the overload.
, 5. What is the primary purpose of a circuit breaker in an electrical distribution system?
A. Increase the available circuit voltage
B. Improve the power factor of the load
C. Provide continuous voltage regulation
D. Interrupt current when an overcurrent condition occurs
Rationale: Circuit breakers are overcurrent protective devices designed to open a circuit when
current exceeds the permitted level under specified conditions. They protect conductors and
equipment from excessive current.
6. An electrician reads 120 V across a properly energized receptacle's hot and neutral
terminals. What does this measurement primarily indicate?
A. The receptacle is necessarily capable of carrying any load
B. There is approximately 120 volts of potential difference between the two points
C. The circuit has zero current
D. The grounding conductor is definitely continuous
Rationale: A voltage measurement establishes potential difference between the two test points.
It does not by itself prove the condition of the grounding path, the load capacity, or the amount
of current flowing.
7. When interpreting an electrical schematic, what does a normally open contact generally
indicate in its normal, de-energized state?
A. The contact is mechanically welded closed
B. The contact always carries maximum current
C. The contact is open until the device operates to close it
D. The contact is permanently connected to neutral
Rationale: A normally open contact is shown in its normal state as open. Operation of the
associated relay, switch, or control device changes its state and closes the circuit.
8. A conductor has excessive voltage drop under load even though the source voltage is
correct. Which factor is most likely contributing to the problem?
A. Excessive conductor resistance due to length, size, or connection condition
B. A properly bonded enclosure
C. A correctly sized grounding electrode
D. A lower-than-normal ambient temperature
Rationale: Voltage drop results from current flowing through resistance. Long conductors,
undersized conductors, poor connections, and excessive load current can increase voltage drop.
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE | EXAM PREP |
STUDY GUIDE | PRACTICE TEST
CORE DOMAINS
1. Repair, Installation, and Maintenance of Electrical Systems
2. Single-Phase and Three-Phase Electricity
3. AC/DC Circuits, Motors, and Control Systems
4. Electrical Safety and Safe Work Practices
5. Electrical Drawings, Schematics, Blueprints, and Specifications
6. Electrical Calculations, Measuring Instruments, and Meters
7. NYC Electrical Code and Installation Requirements
8. Fire Alarm, Communications, Lighting, Heat, and Power Systems
9. Tools, Materials, Conduit, Raceways, and Wiring Methods
10. Supervision, Planning, Administrative Duties, and Professional Ethics
INTRODUCTION
The NYC Electrician (CUNY) examination evaluates the knowledge and abilities needed to install,
maintain, repair, test, and troubleshoot electrical systems in CUNY facilities. The official
examination areas include repair, installation and maintenance, safety, interpretation and
revision of drawings, supervising, and administrative duties, with coverage extending to AC/DC
circuits, electrical calculations, control systems, wiring methods, meters, the NYC Electrical
Code, and professional conduct. This practice test is designed to strengthen both technical
knowledge and practical judgment. Scenario-based questions require candidates to apply
principles to realistic electrical work situations, making understanding and sound decision-
making more valuable than memorizing isolated facts.
SECTION ONE
QUESTIONS 1–50
1. An electrician is preparing to work on a branch circuit that supplies several receptacles.
Before beginning the repair, which action provides the most important initial protection
against accidental energization?
,A. Place a warning sign near the nearest receptacle
B. Remove the receptacle cover plate
C. De-energize the circuit and verify the absence of voltage with an appropriate tester
D. Ask another worker whether the circuit is normally energized
Rationale: De-energizing and testing establish that the conductors are actually dead before work
begins. A switch or breaker position alone is not sufficient because circuits can be mislabeled,
backfed, or otherwise energized unexpectedly.
2. Which instrument is most appropriate for measuring the voltage between two energized
conductors?
A. Voltmeter
B. Clamp-on ammeter
C. Megohmmeter
D. Continuity tester
Rationale: A voltmeter measures electrical potential difference between two points. An ammeter
measures current, while insulation and continuity instruments serve different testing purposes.
3. In a balanced three-phase system, the three phase conductors are separated electrically
by approximately what angular displacement?
A. 60 degrees
B. 90 degrees
C. 120 degrees
D. 120 degrees
Rationale: The three phases of a balanced three-phase system are displaced by 120 electrical
degrees from one another. This phase relationship allows efficient transmission and operation of
three-phase equipment.
4. A motor repeatedly trips its overload protection shortly after starting. The motor is not
mechanically jammed. Which condition should be investigated first?
A. The color of the motor enclosure
B. Excessive current caused by an electrical or load-related problem
C. The length of the grounding electrode conductor
D. The position of the disconnect handle
Rationale: Repeated overload operation indicates that the motor is drawing excessive current or
experiencing an abnormal load condition. Voltage, connections, motor condition, and
mechanical loading should be investigated before repeatedly resetting the overload.
, 5. What is the primary purpose of a circuit breaker in an electrical distribution system?
A. Increase the available circuit voltage
B. Improve the power factor of the load
C. Provide continuous voltage regulation
D. Interrupt current when an overcurrent condition occurs
Rationale: Circuit breakers are overcurrent protective devices designed to open a circuit when
current exceeds the permitted level under specified conditions. They protect conductors and
equipment from excessive current.
6. An electrician reads 120 V across a properly energized receptacle's hot and neutral
terminals. What does this measurement primarily indicate?
A. The receptacle is necessarily capable of carrying any load
B. There is approximately 120 volts of potential difference between the two points
C. The circuit has zero current
D. The grounding conductor is definitely continuous
Rationale: A voltage measurement establishes potential difference between the two test points.
It does not by itself prove the condition of the grounding path, the load capacity, or the amount
of current flowing.
7. When interpreting an electrical schematic, what does a normally open contact generally
indicate in its normal, de-energized state?
A. The contact is mechanically welded closed
B. The contact always carries maximum current
C. The contact is open until the device operates to close it
D. The contact is permanently connected to neutral
Rationale: A normally open contact is shown in its normal state as open. Operation of the
associated relay, switch, or control device changes its state and closes the circuit.
8. A conductor has excessive voltage drop under load even though the source voltage is
correct. Which factor is most likely contributing to the problem?
A. Excessive conductor resistance due to length, size, or connection condition
B. A properly bonded enclosure
C. A correctly sized grounding electrode
D. A lower-than-normal ambient temperature
Rationale: Voltage drop results from current flowing through resistance. Long conductors,
undersized conductors, poor connections, and excessive load current can increase voltage drop.
