Texas Journeyman Electrician Exam Newest
(2026 Update) Actual Practice Questions –
Set 100 Most Common Exam Questions
And Answers In Details 100% Verified Exam
Highly Recommendable For Grade A+
Question 1
A 120V branch circuit supplies a continuous load of 14 amps. What is the
minimum conductor ampacity required?
A. 14A
B. 16A
C. 17.5A
D. 20A
Answer: D. ✔ [20A]
*Rationale: Continuous loads require conductors sized at 125% of load. 14A × 1.25
= 17.5A, so the next standard size is 20A.
Question 2
Which device is primarily used to protect against ground-fault current in wet
locations?
A. AFCI
B. GFCI
C. Fuse
D. Thermal relay
Answer: B. ✔ [GFCI]
*Rationale: GFCI devices are designed to interrupt circuits when ground-fault
leakage is detected, especially in wet or outdoor areas.
,Question 3
According to standard electrical practice, the color of a grounded neutral
conductor in a 120/240V system is typically:
A. Green
B. Red
C. White
D. Black
Answer: C. ✔ [White]
*Rationale: White or gray insulation is reserved for grounded neutral conductors.
Question 4
What is the maximum number of 12 AWG THHN conductors allowed in a 3/4"
EMT conduit?
A. 7
B. 9
C. 12
D. 16
Answer: B. ✔ [9]
*Rationale: Based on conduit fill tables, 3/4" EMT allows up to 9 conductors of 12
AWG THHN.
Question 5
A motor draws 24 amps at full load. What is the minimum circuit breaker size?
A. 24A
B. 30A
C. 40A
D. 50A
Answer: B. ✔ [30A]
*Rationale: Motor branch circuit protection typically requires 125% sizing. 24 ×
1.25 = 30A.
, Question 6
Which of the following is an example of a series circuit?
A. Household receptacles
B. Christmas lights (older style)
C. Residential wiring system
D. Parallel lighting circuits
Answer: B. ✔ [Christmas lights (older style)]
*Rationale: Series circuits allow current through one path only, commonly seen in
older decorative light strings.
Question 7
What is the resistance of a circuit with 240V and 12A current?
A. 10 ohms
B. 15 ohms
C. 20 ohms
D. 30 ohms
Answer: C. ✔ [20 ohms]
*Rationale: Using Ohm’s Law: R = V ÷ I = 240 ÷ 12 = 20 ohms.
Question 8
What is the purpose of a bonding conductor?
A. Carry load current
B. Increase resistance
C. Ensure electrical continuity
D. Reduce voltage drop
Answer: C. ✔ [Ensure electrical continuity]
*Rationale: Bonding ensures all metal parts are electrically connected to prevent
potential differences.
Question 9
Which device protects against overloads and short circuits?
(2026 Update) Actual Practice Questions –
Set 100 Most Common Exam Questions
And Answers In Details 100% Verified Exam
Highly Recommendable For Grade A+
Question 1
A 120V branch circuit supplies a continuous load of 14 amps. What is the
minimum conductor ampacity required?
A. 14A
B. 16A
C. 17.5A
D. 20A
Answer: D. ✔ [20A]
*Rationale: Continuous loads require conductors sized at 125% of load. 14A × 1.25
= 17.5A, so the next standard size is 20A.
Question 2
Which device is primarily used to protect against ground-fault current in wet
locations?
A. AFCI
B. GFCI
C. Fuse
D. Thermal relay
Answer: B. ✔ [GFCI]
*Rationale: GFCI devices are designed to interrupt circuits when ground-fault
leakage is detected, especially in wet or outdoor areas.
,Question 3
According to standard electrical practice, the color of a grounded neutral
conductor in a 120/240V system is typically:
A. Green
B. Red
C. White
D. Black
Answer: C. ✔ [White]
*Rationale: White or gray insulation is reserved for grounded neutral conductors.
Question 4
What is the maximum number of 12 AWG THHN conductors allowed in a 3/4"
EMT conduit?
A. 7
B. 9
C. 12
D. 16
Answer: B. ✔ [9]
*Rationale: Based on conduit fill tables, 3/4" EMT allows up to 9 conductors of 12
AWG THHN.
Question 5
A motor draws 24 amps at full load. What is the minimum circuit breaker size?
A. 24A
B. 30A
C. 40A
D. 50A
Answer: B. ✔ [30A]
*Rationale: Motor branch circuit protection typically requires 125% sizing. 24 ×
1.25 = 30A.
, Question 6
Which of the following is an example of a series circuit?
A. Household receptacles
B. Christmas lights (older style)
C. Residential wiring system
D. Parallel lighting circuits
Answer: B. ✔ [Christmas lights (older style)]
*Rationale: Series circuits allow current through one path only, commonly seen in
older decorative light strings.
Question 7
What is the resistance of a circuit with 240V and 12A current?
A. 10 ohms
B. 15 ohms
C. 20 ohms
D. 30 ohms
Answer: C. ✔ [20 ohms]
*Rationale: Using Ohm’s Law: R = V ÷ I = 240 ÷ 12 = 20 ohms.
Question 8
What is the purpose of a bonding conductor?
A. Carry load current
B. Increase resistance
C. Ensure electrical continuity
D. Reduce voltage drop
Answer: C. ✔ [Ensure electrical continuity]
*Rationale: Bonding ensures all metal parts are electrically connected to prevent
potential differences.
Question 9
Which device protects against overloads and short circuits?
