Apprentice Electrician Licensing Exam
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. What does NEC stand for?
A. National Electrical Code
B. National Energy Circuit
C. New Electric Code
D. National Electric Control
Answer: A
Rationale: NEC stands for National Electrical Code, which governs safe
electrical installation practices.
2. What color is typically used for grounding conductors?
A. Black
B. Red
C. Green
D. White
Answer: C
Rationale: Green or bare conductors are used for grounding to ensure
safety.
,3. Which tool is used to measure voltage?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: B
Rationale: A voltmeter measures electrical potential difference (voltage).
4. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C
Rationale: Resistance is measured in ohms (Ω).
5. What does a circuit breaker do?
A. Stores energy
B. Converts voltage
C. Protects circuit from overload
D. Measures current
Answer: C
Rationale: Circuit breakers automatically stop current flow during
overload or short circuits.
6. What is the standard voltage in most residential homes?
A. 120/240 volts
B. 12 volts
C. 480 volts
D. 600 volts
Answer: A
Rationale: Most homes use 120/240V split-phase systems.
7. What type of current flows in one direction?
A. AC
, B. DC
C. Both
D. None
Answer: B
Rationale: Direct current (DC) flows in one direction only.
8. What does a fuse do?
A. Amplifies current
B. Breaks circuit on overload
C. Stores power
D. Converts AC to DC
Answer: B
Rationale: A fuse melts when excessive current flows, breaking the circuit.
9. Which device converts AC to DC?
A. Transformer
B. Rectifier
C. Capacitor
D. Inductor
Answer: B
Rationale: Rectifiers convert alternating current to direct current.
10.What is the purpose of insulation on wires?
A. Conduct electricity
B. Prevent shocks
C. Increase voltage
D. Reduce resistance
Answer: B
Rationale: Insulation prevents electrical shock and short circuits.
11.What is amperage?
A. Resistance
B. Voltage
C. Current
D. Power
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. What does NEC stand for?
A. National Electrical Code
B. National Energy Circuit
C. New Electric Code
D. National Electric Control
Answer: A
Rationale: NEC stands for National Electrical Code, which governs safe
electrical installation practices.
2. What color is typically used for grounding conductors?
A. Black
B. Red
C. Green
D. White
Answer: C
Rationale: Green or bare conductors are used for grounding to ensure
safety.
,3. Which tool is used to measure voltage?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: B
Rationale: A voltmeter measures electrical potential difference (voltage).
4. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C
Rationale: Resistance is measured in ohms (Ω).
5. What does a circuit breaker do?
A. Stores energy
B. Converts voltage
C. Protects circuit from overload
D. Measures current
Answer: C
Rationale: Circuit breakers automatically stop current flow during
overload or short circuits.
6. What is the standard voltage in most residential homes?
A. 120/240 volts
B. 12 volts
C. 480 volts
D. 600 volts
Answer: A
Rationale: Most homes use 120/240V split-phase systems.
7. What type of current flows in one direction?
A. AC
, B. DC
C. Both
D. None
Answer: B
Rationale: Direct current (DC) flows in one direction only.
8. What does a fuse do?
A. Amplifies current
B. Breaks circuit on overload
C. Stores power
D. Converts AC to DC
Answer: B
Rationale: A fuse melts when excessive current flows, breaking the circuit.
9. Which device converts AC to DC?
A. Transformer
B. Rectifier
C. Capacitor
D. Inductor
Answer: B
Rationale: Rectifiers convert alternating current to direct current.
10.What is the purpose of insulation on wires?
A. Conduct electricity
B. Prevent shocks
C. Increase voltage
D. Reduce resistance
Answer: B
Rationale: Insulation prevents electrical shock and short circuits.
11.What is amperage?
A. Resistance
B. Voltage
C. Current
D. Power
