Electrical Contractor License Exam
With Actual Questions & Verified
Answers ,Plus Rationales/Expert
Verified For Guaranteed
Pass/2026/Latest Update
1. What does NEC stand for?
A. National Electrical Code
B. National Energy Circuit
C. National Electrical Code
D. Neutral Electric Current
Answer: C
The NEC is the standard for safe electrical design, installation,
and inspection in the U.S.
2. What is the standard voltage for residential outlets in most
homes?
A. 220V
B. 120V
C. 480V
D. 24V
Answer: B
Typical residential outlets operate at 120 volts in many
countries.
3. What device protects against overloads in a circuit?
A. Transformer
B. Capacitor
C. Circuit breaker
, D. Relay
Answer: C
Circuit breakers interrupt current flow when overload occurs.
4. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
Answer: D
Resistance is measured in ohms according to Ohm’s Law.
5. What does a ground fault circuit interrupter (GFCI) do?
A. Boosts voltage
B. Prevents electric shock
C. Stores electricity
D. Measures resistance
Answer: B
GFCIs detect imbalance in current and shut off power quickly.
6. Which wire is typically used as the neutral conductor?
A. Black
B. Red
C. White
D. Green
Answer: C
White wires are designated as neutral conductors.
7. What is Ohm’s Law?
A. P = IV
B. V = IR
C. I = PR
D. R = V²
Answer: B
Ohm’s Law relates voltage, current, and resistance.
, 8. What tool measures electrical current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Wattmeter
Answer: C
An ammeter measures current in amperes.
9. What is the purpose of a transformer?
A. Store energy
B. Increase resistance
C. Change voltage levels
D. Convert DC to AC
Answer: C
Transformers step voltage up or down.
10. What is the frequency of standard AC power?
A. 50 Hz
B. 100 Hz
C. 60 Hz
D. 25 Hz
Answer: C
Standard frequency in many systems is 60 Hz.
11. What does a fuse do?
A. Regulates voltage
B. Protects circuit by melting
C. Stores charge
D. Amplifies current
Answer: B
A fuse melts when excessive current flows.
12. Which conductor carries current to the load?
A. Neutral
B. Ground
With Actual Questions & Verified
Answers ,Plus Rationales/Expert
Verified For Guaranteed
Pass/2026/Latest Update
1. What does NEC stand for?
A. National Electrical Code
B. National Energy Circuit
C. National Electrical Code
D. Neutral Electric Current
Answer: C
The NEC is the standard for safe electrical design, installation,
and inspection in the U.S.
2. What is the standard voltage for residential outlets in most
homes?
A. 220V
B. 120V
C. 480V
D. 24V
Answer: B
Typical residential outlets operate at 120 volts in many
countries.
3. What device protects against overloads in a circuit?
A. Transformer
B. Capacitor
C. Circuit breaker
, D. Relay
Answer: C
Circuit breakers interrupt current flow when overload occurs.
4. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
Answer: D
Resistance is measured in ohms according to Ohm’s Law.
5. What does a ground fault circuit interrupter (GFCI) do?
A. Boosts voltage
B. Prevents electric shock
C. Stores electricity
D. Measures resistance
Answer: B
GFCIs detect imbalance in current and shut off power quickly.
6. Which wire is typically used as the neutral conductor?
A. Black
B. Red
C. White
D. Green
Answer: C
White wires are designated as neutral conductors.
7. What is Ohm’s Law?
A. P = IV
B. V = IR
C. I = PR
D. R = V²
Answer: B
Ohm’s Law relates voltage, current, and resistance.
, 8. What tool measures electrical current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Wattmeter
Answer: C
An ammeter measures current in amperes.
9. What is the purpose of a transformer?
A. Store energy
B. Increase resistance
C. Change voltage levels
D. Convert DC to AC
Answer: C
Transformers step voltage up or down.
10. What is the frequency of standard AC power?
A. 50 Hz
B. 100 Hz
C. 60 Hz
D. 25 Hz
Answer: C
Standard frequency in many systems is 60 Hz.
11. What does a fuse do?
A. Regulates voltage
B. Protects circuit by melting
C. Stores charge
D. Amplifies current
Answer: B
A fuse melts when excessive current flows.
12. Which conductor carries current to the load?
A. Neutral
B. Ground
