COLORADO ELECTRICAL APPRENTICEREGISTRATION
EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DONLOAD PDF
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical appliances
B. To ensure electrical safety standards
C. To calculate electrical bills
D. To manufacture electrical equipment
Rationale: The NEC provides safety guidelines for electrical
installation to protect people and property.
Correct Answer: B
2. Which unit measures electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Rationale: Current is the flow of electric charge measured in
amperes (A).
Correct Answer: C
,3. What does Ohm’s Law state?
A. Power equals voltage times current
B. Current equals voltage divided by resistance
C. Resistance equals current times voltage
D. Voltage equals power divided by current
Rationale: Ohm’s Law is V = I × R, so I = V/R.
Correct Answer: B
4. What tool is used to measure voltage in a circuit?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Rationale: A voltmeter measures electrical potential difference.
Correct Answer: B
5. What is the standard color of a grounding wire in modern
electrical systems?
A. Red
B. Black
C. Green or bare copper
D. Blue
,Rationale: Ground wires are typically green or uninsulated
copper for safety identification.
Correct Answer: C
6. What is the function of a circuit breaker?
A. Increase voltage
B. Store electrical energy
C. Protect against overloads and short circuits
D. Convert AC to DC
Rationale: Circuit breakers automatically disconnect power
during faults.
Correct Answer: C
7. Which material is commonly used as an electrical
conductor?
A. Rubber
B. Glass
C. Copper
D. Plastic
Rationale: Copper has high conductivity and is widely used in
wiring.
Correct Answer: C
8. What does AC stand for in electrical systems?
, A. Applied Current
B. Alternating Current
C. Automatic Charge
D. Active Circuit
Rationale: AC current changes direction periodically.
Correct Answer: B
9. What is the function of a fuse?
A. Increase resistance
B. Protect circuits by melting under excess current
C. Store energy
D. Regulate voltage
Rationale: A fuse breaks the circuit when current exceeds safe
limits.
Correct Answer: B
10. Which of the following is a good electrical insulator?
A. Aluminum
B. Copper
C. Rubber
D. Steel
Rationale: Rubber resists electrical flow and prevents shock.
Correct Answer: C
EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DONLOAD PDF
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical appliances
B. To ensure electrical safety standards
C. To calculate electrical bills
D. To manufacture electrical equipment
Rationale: The NEC provides safety guidelines for electrical
installation to protect people and property.
Correct Answer: B
2. Which unit measures electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Rationale: Current is the flow of electric charge measured in
amperes (A).
Correct Answer: C
,3. What does Ohm’s Law state?
A. Power equals voltage times current
B. Current equals voltage divided by resistance
C. Resistance equals current times voltage
D. Voltage equals power divided by current
Rationale: Ohm’s Law is V = I × R, so I = V/R.
Correct Answer: B
4. What tool is used to measure voltage in a circuit?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Rationale: A voltmeter measures electrical potential difference.
Correct Answer: B
5. What is the standard color of a grounding wire in modern
electrical systems?
A. Red
B. Black
C. Green or bare copper
D. Blue
,Rationale: Ground wires are typically green or uninsulated
copper for safety identification.
Correct Answer: C
6. What is the function of a circuit breaker?
A. Increase voltage
B. Store electrical energy
C. Protect against overloads and short circuits
D. Convert AC to DC
Rationale: Circuit breakers automatically disconnect power
during faults.
Correct Answer: C
7. Which material is commonly used as an electrical
conductor?
A. Rubber
B. Glass
C. Copper
D. Plastic
Rationale: Copper has high conductivity and is widely used in
wiring.
Correct Answer: C
8. What does AC stand for in electrical systems?
, A. Applied Current
B. Alternating Current
C. Automatic Charge
D. Active Circuit
Rationale: AC current changes direction periodically.
Correct Answer: B
9. What is the function of a fuse?
A. Increase resistance
B. Protect circuits by melting under excess current
C. Store energy
D. Regulate voltage
Rationale: A fuse breaks the circuit when current exceeds safe
limits.
Correct Answer: B
10. Which of the following is a good electrical insulator?
A. Aluminum
B. Copper
C. Rubber
D. Steel
Rationale: Rubber resists electrical flow and prevents shock.
Correct Answer: C
