Texas Electrician License Exam 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 appliances
B. To provide installation safety standards
C. To regulate electrical pricing
D. To certify electricians
Correct Answer: B
Rationale: The NEC establishes minimum safety standards for electrical
installations to protect people and property.
2.
Which color is commonly used for the grounding conductor?
A. Red
B. White
C. Green
D. Blue
,Correct Answer: C
Rationale: Green (or green with yellow stripe) is designated for
grounding conductors.
3.
What is Ohm’s Law?
A. V = I × R
B. P = V × I
C. I = P × R
D. V = P ÷ R
Correct Answer: A
Rationale: Ohm’s Law states voltage equals current multiplied by
resistance.
4.
What device protects circuits from overcurrent?
A. Transformer
B. Conduit
C. Circuit breaker
D. Meter
Correct Answer: C
Rationale: Circuit breakers automatically interrupt excessive current
flow.
5.
,The standard voltage for residential service in Texas is:
A. 120V only
B. 240V only
C. 120/240V
D. 277/480V
Correct Answer: C
Rationale: Most homes use a split-phase 120/240V system.
6.
What is the function of a neutral conductor?
A. Carries fault current only
B. Carries unbalanced current back to source
C. Grounds the system
D. Increases voltage
Correct Answer: B
Rationale: Neutral provides a return path for current in normal
operation.
7.
Which tool is used to measure current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Multimeter (voltage mode)
, Correct Answer: C
Rationale: Ammeters measure current flow in amperes.
8.
What does GFCI stand for?
A. General Fault Circuit Interrupter
B. Ground Fault Circuit Interrupter
C. Grounded Fuse Current Indicator
D. General Flow Control Interface
Correct Answer: B
Rationale: GFCI protects against ground faults and electric shock.
9.
Conduit is used for:
A. Increasing voltage
B. Protecting conductors
C. Reducing resistance
D. Generating power
Correct Answer: B
Rationale: Conduit physically protects electrical wiring.
10.
The unit of electrical resistance is:
A. Volt
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 appliances
B. To provide installation safety standards
C. To regulate electrical pricing
D. To certify electricians
Correct Answer: B
Rationale: The NEC establishes minimum safety standards for electrical
installations to protect people and property.
2.
Which color is commonly used for the grounding conductor?
A. Red
B. White
C. Green
D. Blue
,Correct Answer: C
Rationale: Green (or green with yellow stripe) is designated for
grounding conductors.
3.
What is Ohm’s Law?
A. V = I × R
B. P = V × I
C. I = P × R
D. V = P ÷ R
Correct Answer: A
Rationale: Ohm’s Law states voltage equals current multiplied by
resistance.
4.
What device protects circuits from overcurrent?
A. Transformer
B. Conduit
C. Circuit breaker
D. Meter
Correct Answer: C
Rationale: Circuit breakers automatically interrupt excessive current
flow.
5.
,The standard voltage for residential service in Texas is:
A. 120V only
B. 240V only
C. 120/240V
D. 277/480V
Correct Answer: C
Rationale: Most homes use a split-phase 120/240V system.
6.
What is the function of a neutral conductor?
A. Carries fault current only
B. Carries unbalanced current back to source
C. Grounds the system
D. Increases voltage
Correct Answer: B
Rationale: Neutral provides a return path for current in normal
operation.
7.
Which tool is used to measure current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Multimeter (voltage mode)
, Correct Answer: C
Rationale: Ammeters measure current flow in amperes.
8.
What does GFCI stand for?
A. General Fault Circuit Interrupter
B. Ground Fault Circuit Interrupter
C. Grounded Fuse Current Indicator
D. General Flow Control Interface
Correct Answer: B
Rationale: GFCI protects against ground faults and electric shock.
9.
Conduit is used for:
A. Increasing voltage
B. Protecting conductors
C. Reducing resistance
D. Generating power
Correct Answer: B
Rationale: Conduit physically protects electrical wiring.
10.
The unit of electrical resistance is:
A. Volt
