NEW JERSEY ELECTRICAL CONTRACTOR EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical appliances
B. To provide minimum safety standards for electrical
installations
C. To certify electricians
D. To calculate electrical bills
Rationale: NEC sets minimum safety requirements for electrical
systems.
Correct answer: B
2. Ohm’s Law is expressed as:
A. P = VI
B. V = IR
C. I = P/R
D. R = VI
Rationale: Ohm’s Law relates voltage, current, and resistance.
Correct answer: B
3. The unit of electrical resistance is:
A. Volt
B. Ampere
,C. Ohm
D. Watt
Rationale: Resistance is measured in ohms.
Correct answer: C
4. What does a circuit breaker primarily protect against?
A. Low voltage
B. Overcurrent
C. Power factor issues
D. Frequency changes
Rationale: Circuit breakers interrupt excessive current flow.
Correct answer: B
5. A ground wire is used to:
A. Increase voltage
B. Carry normal current
C. Provide a safe path for fault current
D. Reduce resistance
Rationale: Grounding improves safety during faults.
Correct answer: C
6. Series circuits have:
A. Multiple paths for current
B. One path for current
C. No resistance
,D. Constant voltage across all loads
Rationale: Series circuits allow only one current path.
Correct answer: B
7. Parallel circuits are characterized by:
A. One path for current
B. Different current in each branch
C. Multiple current paths
D. No voltage
Rationale: Parallel circuits have multiple branches.
Correct answer: C
8. Power in an electrical circuit is measured in:
A. Volts
B. Amps
C. Watts
D. Ohms
Rationale: Watts measure electrical power.
Correct answer: C
9. What does a fuse do?
A. Stores electricity
B. Increases voltage
C. Opens circuit during overcurrent
D. Reduces resistance
, Rationale: A fuse melts to break excessive current.
Correct answer: C
10. Conductor resistance increases when:
A. Temperature decreases
B. Length decreases
C. Temperature increases
D. Voltage increases
Rationale: Heat increases resistance in conductors.
Correct answer: C
11. The standard voltage in most residential U.S. homes is:
A. 120/240V
B. 12V
C. 480V
D. 24V
Rationale: Residential systems typically use 120/240V.
Correct answer: A
12. A short circuit occurs when:
A. Resistance is very high
B. Current takes unintended low-resistance path
C. Voltage drops to zero
D. Load increases normally
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical appliances
B. To provide minimum safety standards for electrical
installations
C. To certify electricians
D. To calculate electrical bills
Rationale: NEC sets minimum safety requirements for electrical
systems.
Correct answer: B
2. Ohm’s Law is expressed as:
A. P = VI
B. V = IR
C. I = P/R
D. R = VI
Rationale: Ohm’s Law relates voltage, current, and resistance.
Correct answer: B
3. The unit of electrical resistance is:
A. Volt
B. Ampere
,C. Ohm
D. Watt
Rationale: Resistance is measured in ohms.
Correct answer: C
4. What does a circuit breaker primarily protect against?
A. Low voltage
B. Overcurrent
C. Power factor issues
D. Frequency changes
Rationale: Circuit breakers interrupt excessive current flow.
Correct answer: B
5. A ground wire is used to:
A. Increase voltage
B. Carry normal current
C. Provide a safe path for fault current
D. Reduce resistance
Rationale: Grounding improves safety during faults.
Correct answer: C
6. Series circuits have:
A. Multiple paths for current
B. One path for current
C. No resistance
,D. Constant voltage across all loads
Rationale: Series circuits allow only one current path.
Correct answer: B
7. Parallel circuits are characterized by:
A. One path for current
B. Different current in each branch
C. Multiple current paths
D. No voltage
Rationale: Parallel circuits have multiple branches.
Correct answer: C
8. Power in an electrical circuit is measured in:
A. Volts
B. Amps
C. Watts
D. Ohms
Rationale: Watts measure electrical power.
Correct answer: C
9. What does a fuse do?
A. Stores electricity
B. Increases voltage
C. Opens circuit during overcurrent
D. Reduces resistance
, Rationale: A fuse melts to break excessive current.
Correct answer: C
10. Conductor resistance increases when:
A. Temperature decreases
B. Length decreases
C. Temperature increases
D. Voltage increases
Rationale: Heat increases resistance in conductors.
Correct answer: C
11. The standard voltage in most residential U.S. homes is:
A. 120/240V
B. 12V
C. 480V
D. 24V
Rationale: Residential systems typically use 120/240V.
Correct answer: A
12. A short circuit occurs when:
A. Resistance is very high
B. Current takes unintended low-resistance path
C. Voltage drops to zero
D. Load increases normally
