California General Electrician Certification
Examination Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. A primary purpose of the National Electrical Code (NEC) is to:
A. Design electrical systems for commercial buildings
B. Provide minimum safety standards for electrical installations
C. Replace local building codes
D. Establish utility company pricing
Correct Answer: B
The NEC is primarily a safety standard designed to ensure that
electrical installations are safe and reduce hazards such as fire and
shock. It does not replace local codes or address utility pricing or
system design specifics.
2. Which device is designed to protect against overloads and short
circuits?
A. Transformer
B. Switch
, C. Circuit breaker
D. Resistor
Correct Answer: C
A circuit breaker automatically interrupts current flow when an
overload or short circuit occurs, protecting wiring and equipment from
damage.
3. What is the standard unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Correct Answer: C
Resistance is measured in ohms (Ω), which quantifies how much a
material opposes the flow of electric current.
4. Ohm’s Law is expressed as:
A. P = IV
B. V = IR
C. I = PR
D. R = VI
,Correct Answer: B
Ohm’s Law defines the relationship between voltage, current, and
resistance: voltage equals current multiplied by resistance.
5. A 20-amp circuit typically requires conductors rated for at least:
A. 10 amperes
B. 15 amperes
C. 20 amperes
D. 30 amperes
Correct Answer: C
Conductors must be rated to safely handle the circuit’s maximum
current, so a 20-amp circuit requires at least 20-amp-rated conductors.
6. What color is commonly used for grounding conductors in the
United States?
A. White
B. Black
C. Green
D. Red
Correct Answer: C
Green insulation is designated for equipment grounding conductors to
identify them clearly and prevent misuse.
, 7. The function of a transformer is to:
A. Store electrical energy
B. Change voltage levels
C. Convert AC to DC
D. Limit current flow
Correct Answer: B
Transformers increase (step-up) or decrease (step-down) voltage using
electromagnetic induction.
8. Which of the following is a conductor material commonly used in
residential wiring?
A. Aluminum
B. Rubber
C. Glass
D. Plastic
Correct Answer: A
Aluminum and copper are common conductor materials due to their
high electrical conductivity.
9. The term “ampere” refers to:
A. Electrical pressure
B. Rate of electron flow
Examination Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. A primary purpose of the National Electrical Code (NEC) is to:
A. Design electrical systems for commercial buildings
B. Provide minimum safety standards for electrical installations
C. Replace local building codes
D. Establish utility company pricing
Correct Answer: B
The NEC is primarily a safety standard designed to ensure that
electrical installations are safe and reduce hazards such as fire and
shock. It does not replace local codes or address utility pricing or
system design specifics.
2. Which device is designed to protect against overloads and short
circuits?
A. Transformer
B. Switch
, C. Circuit breaker
D. Resistor
Correct Answer: C
A circuit breaker automatically interrupts current flow when an
overload or short circuit occurs, protecting wiring and equipment from
damage.
3. What is the standard unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Correct Answer: C
Resistance is measured in ohms (Ω), which quantifies how much a
material opposes the flow of electric current.
4. Ohm’s Law is expressed as:
A. P = IV
B. V = IR
C. I = PR
D. R = VI
,Correct Answer: B
Ohm’s Law defines the relationship between voltage, current, and
resistance: voltage equals current multiplied by resistance.
5. A 20-amp circuit typically requires conductors rated for at least:
A. 10 amperes
B. 15 amperes
C. 20 amperes
D. 30 amperes
Correct Answer: C
Conductors must be rated to safely handle the circuit’s maximum
current, so a 20-amp circuit requires at least 20-amp-rated conductors.
6. What color is commonly used for grounding conductors in the
United States?
A. White
B. Black
C. Green
D. Red
Correct Answer: C
Green insulation is designated for equipment grounding conductors to
identify them clearly and prevent misuse.
, 7. The function of a transformer is to:
A. Store electrical energy
B. Change voltage levels
C. Convert AC to DC
D. Limit current flow
Correct Answer: B
Transformers increase (step-up) or decrease (step-down) voltage using
electromagnetic induction.
8. Which of the following is a conductor material commonly used in
residential wiring?
A. Aluminum
B. Rubber
C. Glass
D. Plastic
Correct Answer: A
Aluminum and copper are common conductor materials due to their
high electrical conductivity.
9. The term “ampere” refers to:
A. Electrical pressure
B. Rate of electron flow
