Texas Journeyman Electrician Certification
Exam Prep | Questions And Answers With
Verified Rationales | 2026/27 Qs & Ans | Digital
Pdf Download
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Increase power generation
B. Ensure safe electrical installation practices
C. Design transformers
D. Manage utility billing
Answer: B. Ensure safe electrical installation practices
Rationale: The NEC provides minimum safety standards for electrical
systems.
2. What does a GFCI protect against?
A. Overvoltage
B. Ground faults and electric shock
C. Power outages
D. High resistance
Answer: B. Ground faults and electric shock
Rationale: Ground Fault Circuit Interrupters quickly shut off power
during leakage.
© 2026 Academics_Excellence
,3. What is the standard voltage for residential service in Texas?
A. 120/240V
B. 240/480V
C. 277/480V
D. 600V
Answer: A. 120/240V
Rationale: Most residential homes use split-phase 120/240V systems.
4. What is the function of a circuit breaker?
A. Store electricity
B. Protect circuits from overloads and short circuits
C. Increase voltage
D. Convert AC to DC
Answer: B. Protect circuits from overloads and short circuits
Rationale: Breakers interrupt abnormal current flow.
5. What does LOTO stand for?
A. Line Output Terminal Operation
B. Lockout/Tagout
C. Load Operating Time Override
D. Low Output Transformer Operation
Answer: B. Lockout/Tagout
Rationale: LOTO ensures equipment is safely de-energized before work.
© 2026 Academics_Excellence
,6. What is the function of a multimeter?
A. Store energy
B. Measure voltage, current, and resistance
C. Generate electricity
D. Increase load
Answer: B. Measure voltage, current, and resistance
Rationale: Multimeters are essential diagnostic tools.
7. What is the purpose of grounding in electrical systems?
A. Increase voltage
B. Provide a safe fault current path
C. Store electricity
D. Boost current flow
Answer: B. Provide a safe fault current path
Rationale: Grounding prevents electric shock and equipment damage.
8. What is ampacity?
A. Voltage rating
B. Maximum current a conductor can safely carry
C. Resistance level
D. Power factor
© 2026 Academics_Excellence
, Answer: B. Maximum current a conductor can safely carry
Rationale: Ampacity depends on wire size and insulation.
9. What device protects against overcurrent conditions?
A. Transformer
B. Fuse or circuit breaker
C. Capacitor
D. Relay coil
Answer: B. Fuse or circuit breaker
Rationale: These devices interrupt excessive current flow.
10. What is a short circuit?
A. Normal operation
B. Unintended low-resistance path
C. High resistance path
D. Voltage regulation
Answer: B. Unintended low-resistance path
Rationale: Short circuits can cause fires and damage.
11. What is voltage?
A. Flow of electrons
B. Electrical pressure
© 2026 Academics_Excellence
Exam Prep | Questions And Answers With
Verified Rationales | 2026/27 Qs & Ans | Digital
Pdf Download
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Increase power generation
B. Ensure safe electrical installation practices
C. Design transformers
D. Manage utility billing
Answer: B. Ensure safe electrical installation practices
Rationale: The NEC provides minimum safety standards for electrical
systems.
2. What does a GFCI protect against?
A. Overvoltage
B. Ground faults and electric shock
C. Power outages
D. High resistance
Answer: B. Ground faults and electric shock
Rationale: Ground Fault Circuit Interrupters quickly shut off power
during leakage.
© 2026 Academics_Excellence
,3. What is the standard voltage for residential service in Texas?
A. 120/240V
B. 240/480V
C. 277/480V
D. 600V
Answer: A. 120/240V
Rationale: Most residential homes use split-phase 120/240V systems.
4. What is the function of a circuit breaker?
A. Store electricity
B. Protect circuits from overloads and short circuits
C. Increase voltage
D. Convert AC to DC
Answer: B. Protect circuits from overloads and short circuits
Rationale: Breakers interrupt abnormal current flow.
5. What does LOTO stand for?
A. Line Output Terminal Operation
B. Lockout/Tagout
C. Load Operating Time Override
D. Low Output Transformer Operation
Answer: B. Lockout/Tagout
Rationale: LOTO ensures equipment is safely de-energized before work.
© 2026 Academics_Excellence
,6. What is the function of a multimeter?
A. Store energy
B. Measure voltage, current, and resistance
C. Generate electricity
D. Increase load
Answer: B. Measure voltage, current, and resistance
Rationale: Multimeters are essential diagnostic tools.
7. What is the purpose of grounding in electrical systems?
A. Increase voltage
B. Provide a safe fault current path
C. Store electricity
D. Boost current flow
Answer: B. Provide a safe fault current path
Rationale: Grounding prevents electric shock and equipment damage.
8. What is ampacity?
A. Voltage rating
B. Maximum current a conductor can safely carry
C. Resistance level
D. Power factor
© 2026 Academics_Excellence
, Answer: B. Maximum current a conductor can safely carry
Rationale: Ampacity depends on wire size and insulation.
9. What device protects against overcurrent conditions?
A. Transformer
B. Fuse or circuit breaker
C. Capacitor
D. Relay coil
Answer: B. Fuse or circuit breaker
Rationale: These devices interrupt excessive current flow.
10. What is a short circuit?
A. Normal operation
B. Unintended low-resistance path
C. High resistance path
D. Voltage regulation
Answer: B. Unintended low-resistance path
Rationale: Short circuits can cause fires and damage.
11. What is voltage?
A. Flow of electrons
B. Electrical pressure
© 2026 Academics_Excellence
