NYC DCAS Electrician Exam (Civil
Service) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. According to the National Electrical Code (NEC), what is the primary
purpose of grounding?
A. Increase voltage
B. Reduce current flow
C. Provide a safe path for fault current
D. Improve lighting
Answer: Provide a safe path for fault current
Rationale: Grounding directs fault current safely to earth or back to the source,
reducing shock and fire hazards.
2. What color is typically used for grounded neutral conductors?
A. Red
B. Green
C. Blue
D. White
,Answer: White
Rationale: The NEC identifies grounded neutral conductors with white or gray
insulation.
3. What instrument measures electrical resistance?
A. Ammeter
B. Wattmeter
C. Voltmeter
D. Ohmmeter
Answer: Ohmmeter
Rationale: An ohmmeter measures resistance in ohms within a circuit or
component.
4. What is the unit of electrical power?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: Watt
Rationale: Power is measured in watts and is calculated as volts multiplied by
amperes.
5. Which law states that voltage equals current multiplied by resistance?
A. Kirchhoff's Law
B. Faraday's Law
C. Coulomb's Law
D. Ohm's Law
,Answer: Ohm's Law
Rationale: Ohm's Law is expressed as V = I × R.
6. A circuit breaker protects primarily against:
A. Low voltage
B. Moisture
C. Overcurrent conditions
D. Power factor issues
Answer: Overcurrent conditions
Rationale: Circuit breakers open automatically when current exceeds safe limits.
7. Which conductor is connected to electrical equipment frames?
A. Hot conductor
B. Neutral conductor
C. Traveler conductor
D. Equipment grounding conductor
Answer: Equipment grounding conductor
Rationale: Equipment grounding conductors bond metal parts to prevent shock
hazards.
8. Electrical current is measured in:
A. Volts
B. Ohms
C. Watts
D. Amperes
Answer: Amperes
, Rationale: Current flow is measured in amperes or amps.
9. What is the voltage of a typical single-phase receptacle in the United
States?
A. 24 volts
B. 48 volts
C. 120 volts
D. 600 volts
Answer: 120 volts
Rationale: Standard residential receptacles typically operate at 120 volts.
10.What device is used to pull conductors through conduit?
A. Reamer
B. Bender
C. Fish tape
D. Knockout punch
Answer: Fish tape
Rationale: Fish tape is designed to route conductors through raceways.
11.What is electrical continuity?
A. Voltage fluctuation
B. Resistance increase
C. Power factor correction
D. An unbroken electrical path
Answer: An unbroken electrical path
Rationale: Continuity indicates a complete path for current flow.
Service) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. According to the National Electrical Code (NEC), what is the primary
purpose of grounding?
A. Increase voltage
B. Reduce current flow
C. Provide a safe path for fault current
D. Improve lighting
Answer: Provide a safe path for fault current
Rationale: Grounding directs fault current safely to earth or back to the source,
reducing shock and fire hazards.
2. What color is typically used for grounded neutral conductors?
A. Red
B. Green
C. Blue
D. White
,Answer: White
Rationale: The NEC identifies grounded neutral conductors with white or gray
insulation.
3. What instrument measures electrical resistance?
A. Ammeter
B. Wattmeter
C. Voltmeter
D. Ohmmeter
Answer: Ohmmeter
Rationale: An ohmmeter measures resistance in ohms within a circuit or
component.
4. What is the unit of electrical power?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: Watt
Rationale: Power is measured in watts and is calculated as volts multiplied by
amperes.
5. Which law states that voltage equals current multiplied by resistance?
A. Kirchhoff's Law
B. Faraday's Law
C. Coulomb's Law
D. Ohm's Law
,Answer: Ohm's Law
Rationale: Ohm's Law is expressed as V = I × R.
6. A circuit breaker protects primarily against:
A. Low voltage
B. Moisture
C. Overcurrent conditions
D. Power factor issues
Answer: Overcurrent conditions
Rationale: Circuit breakers open automatically when current exceeds safe limits.
7. Which conductor is connected to electrical equipment frames?
A. Hot conductor
B. Neutral conductor
C. Traveler conductor
D. Equipment grounding conductor
Answer: Equipment grounding conductor
Rationale: Equipment grounding conductors bond metal parts to prevent shock
hazards.
8. Electrical current is measured in:
A. Volts
B. Ohms
C. Watts
D. Amperes
Answer: Amperes
, Rationale: Current flow is measured in amperes or amps.
9. What is the voltage of a typical single-phase receptacle in the United
States?
A. 24 volts
B. 48 volts
C. 120 volts
D. 600 volts
Answer: 120 volts
Rationale: Standard residential receptacles typically operate at 120 volts.
10.What device is used to pull conductors through conduit?
A. Reamer
B. Bender
C. Fish tape
D. Knockout punch
Answer: Fish tape
Rationale: Fish tape is designed to route conductors through raceways.
11.What is electrical continuity?
A. Voltage fluctuation
B. Resistance increase
C. Power factor correction
D. An unbroken electrical path
Answer: An unbroken electrical path
Rationale: Continuity indicates a complete path for current flow.
