Utah Electrical Contractor Licensing Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical utility grids
B. To ensure electrical installations are safe
C. To calculate electrical bills
D. To regulate utility pricing
Answer: B
The NEC is primarily a safety standard intended to safeguard people
and property from electrical hazards. It provides minimum installation
requirements for safe electrical systems rather than utility operations
or pricing.
2. Which organization publishes the NEC?
A. OSHA
, B. IEEE
C. NFPA
D. NEMA
Answer: C
The National Fire Protection Association (NFPA) publishes the NEC as
NFPA 70, which is updated every three years.
3. In residential wiring, what is the standard voltage for general-use
receptacles in the U.S.?
A. 120V
B. 240V
C. 277V
D. 480V
Answer: A
Standard household receptacles are typically 120 volts in North
America, used for lighting and general-purpose outlets.
4. What does a ground-fault circuit interrupter (GFCI) protect
against?
A. Overvoltage
, B. Short circuits
C. Ground faults and shock hazards
D. Power surges
Answer: C
A GFCI detects imbalance between hot and neutral conductors and
quickly shuts off power to prevent electrical shock.
5. The purpose of a circuit breaker is to:
A. Increase voltage
B. Prevent overloads and short circuits
C. Store electrical energy
D. Convert AC to DC
Answer: B
A circuit breaker automatically opens a circuit when excessive current
flows, preventing overheating and fire hazards.
6. What is the standard frequency of electrical power in the United
States?
A. 50 Hz
B. 60 Hz
, C. 100 Hz
D. 120 Hz
Answer: B
The U.S. electrical grid operates at 60 hertz alternating current
frequency.
7. Which color is commonly used for equipment grounding
conductors?
A. Red
B. White
C. Green
D. Black
Answer: C
Green (or bare copper) conductors are designated for grounding to
ensure safe fault current paths.
8. What is Ohm’s Law?
A. V = I × R
B. P = V × I
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical utility grids
B. To ensure electrical installations are safe
C. To calculate electrical bills
D. To regulate utility pricing
Answer: B
The NEC is primarily a safety standard intended to safeguard people
and property from electrical hazards. It provides minimum installation
requirements for safe electrical systems rather than utility operations
or pricing.
2. Which organization publishes the NEC?
A. OSHA
, B. IEEE
C. NFPA
D. NEMA
Answer: C
The National Fire Protection Association (NFPA) publishes the NEC as
NFPA 70, which is updated every three years.
3. In residential wiring, what is the standard voltage for general-use
receptacles in the U.S.?
A. 120V
B. 240V
C. 277V
D. 480V
Answer: A
Standard household receptacles are typically 120 volts in North
America, used for lighting and general-purpose outlets.
4. What does a ground-fault circuit interrupter (GFCI) protect
against?
A. Overvoltage
, B. Short circuits
C. Ground faults and shock hazards
D. Power surges
Answer: C
A GFCI detects imbalance between hot and neutral conductors and
quickly shuts off power to prevent electrical shock.
5. The purpose of a circuit breaker is to:
A. Increase voltage
B. Prevent overloads and short circuits
C. Store electrical energy
D. Convert AC to DC
Answer: B
A circuit breaker automatically opens a circuit when excessive current
flows, preventing overheating and fire hazards.
6. What is the standard frequency of electrical power in the United
States?
A. 50 Hz
B. 60 Hz
, C. 100 Hz
D. 120 Hz
Answer: B
The U.S. electrical grid operates at 60 hertz alternating current
frequency.
7. Which color is commonly used for equipment grounding
conductors?
A. Red
B. White
C. Green
D. Black
Answer: C
Green (or bare copper) conductors are designated for grounding to
ensure safe fault current paths.
8. What is Ohm’s Law?
A. V = I × R
B. P = V × I
