ALASKA JOURNEYMAN ELECTRICIAN EXAM
NEWEST UPDATE 2026 VERSION 100
QUESTIONS & DETAILED CORRECT ANSWERS
GRADE A+ (100% SUCCESS) BRAND NEW
VERSION!!
1. Which of the following is the primary purpose of a grounding conductor?
A. To carry normal operating current
B. To limit voltage surges
C. To provide a path to earth for fault current
D. To act as a neutral conductor
Answer: C
Rationale: The grounding conductor is intended to provide a safe path to
earth to prevent shock hazards during fault conditions.
2. What is the maximum number of 15-ampere, 120-volt general-purpose
circuits that can be installed on a 20-ampere branch circuit in a dwelling
unit?
A. 1
B. 2
C. 3
D. 4
Answer: C
Rationale: NEC allows multiple 15-amp circuits on a 20-amp branch, but
load calculations and code restrictions must be observed; typically up to 3 is
standard.
3. What is the minimum size copper grounding electrode conductor for a 100-
ampere service?
A. 8 AWG
B. 6 AWG
, C. 4 AWG
D. 2 AWG
Answer: B
Rationale: NEC Table 250.66 specifies 6 AWG copper as minimum for a 100-
amp service.
4. Which type of conduit is approved for wet locations?
A. EMT
B. PVC Schedule 40
C. RMC
D. All of the above
Answer: D
Rationale: EMT, RMC, and PVC are all approved for wet locations if installed
per NEC requirements.
5. A three-phase, four-wire wye system has a line-to-line voltage of 480V.
What is the line-to-neutral voltage?
A. 208V
B. 277V
C. 120V
D. 240V
Answer: B
Rationale: Line-to-neutral voltage in a wye system = line-to-line voltage ÷ √3
→ 480 ÷ 1.732 ≈ 277V.
6. Which device is used to detect ground faults in a residential circuit?
A. GFCI
B. AFCI
C. MCB
D. FUSE
Answer: A
Rationale: Ground Fault Circuit Interrupters (GFCIs) protect against shock
from ground faults.
, 7. What is the minimum working space depth in front of a 480V switchgear?
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 6 feet
Answer: C
Rationale: NEC 110.26 requires at least 4 feet of clear working space in front
of equipment rated over 480 volts.
8. Which of the following is required for the installation of aluminum wiring?
A. Use only copper connectors
B. Apply anti-oxidant compound
C. Increase wire size by one AWG
D. All of the above
Answer: D
Rationale: Aluminum wiring requires proper connectors, antioxidant
compound, and sometimes increased wire size to prevent overheating.
9. In a 120/240V single-phase system, what is the current in each leg of a 20-
ampere breaker supplying a balanced 240V load?
A. 10A
B. 20A
C. 30A
D. 40A
Answer: B
Rationale: In a balanced 240V load, each leg carries the same current as the
breaker rating.
10.What is the maximum voltage drop recommended for branch circuits to
maintain efficiency?
A. 1%
B. 3%
C. 5%
D. 10%
NEWEST UPDATE 2026 VERSION 100
QUESTIONS & DETAILED CORRECT ANSWERS
GRADE A+ (100% SUCCESS) BRAND NEW
VERSION!!
1. Which of the following is the primary purpose of a grounding conductor?
A. To carry normal operating current
B. To limit voltage surges
C. To provide a path to earth for fault current
D. To act as a neutral conductor
Answer: C
Rationale: The grounding conductor is intended to provide a safe path to
earth to prevent shock hazards during fault conditions.
2. What is the maximum number of 15-ampere, 120-volt general-purpose
circuits that can be installed on a 20-ampere branch circuit in a dwelling
unit?
A. 1
B. 2
C. 3
D. 4
Answer: C
Rationale: NEC allows multiple 15-amp circuits on a 20-amp branch, but
load calculations and code restrictions must be observed; typically up to 3 is
standard.
3. What is the minimum size copper grounding electrode conductor for a 100-
ampere service?
A. 8 AWG
B. 6 AWG
, C. 4 AWG
D. 2 AWG
Answer: B
Rationale: NEC Table 250.66 specifies 6 AWG copper as minimum for a 100-
amp service.
4. Which type of conduit is approved for wet locations?
A. EMT
B. PVC Schedule 40
C. RMC
D. All of the above
Answer: D
Rationale: EMT, RMC, and PVC are all approved for wet locations if installed
per NEC requirements.
5. A three-phase, four-wire wye system has a line-to-line voltage of 480V.
What is the line-to-neutral voltage?
A. 208V
B. 277V
C. 120V
D. 240V
Answer: B
Rationale: Line-to-neutral voltage in a wye system = line-to-line voltage ÷ √3
→ 480 ÷ 1.732 ≈ 277V.
6. Which device is used to detect ground faults in a residential circuit?
A. GFCI
B. AFCI
C. MCB
D. FUSE
Answer: A
Rationale: Ground Fault Circuit Interrupters (GFCIs) protect against shock
from ground faults.
, 7. What is the minimum working space depth in front of a 480V switchgear?
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 6 feet
Answer: C
Rationale: NEC 110.26 requires at least 4 feet of clear working space in front
of equipment rated over 480 volts.
8. Which of the following is required for the installation of aluminum wiring?
A. Use only copper connectors
B. Apply anti-oxidant compound
C. Increase wire size by one AWG
D. All of the above
Answer: D
Rationale: Aluminum wiring requires proper connectors, antioxidant
compound, and sometimes increased wire size to prevent overheating.
9. In a 120/240V single-phase system, what is the current in each leg of a 20-
ampere breaker supplying a balanced 240V load?
A. 10A
B. 20A
C. 30A
D. 40A
Answer: B
Rationale: In a balanced 240V load, each leg carries the same current as the
breaker rating.
10.What is the maximum voltage drop recommended for branch circuits to
maintain efficiency?
A. 1%
B. 3%
C. 5%
D. 10%
