Alaska Journeyman Electrician Practice Exam Verified
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already Graded
A+
1. What is the maximum number of 20-ampere branch circuits that
can be installed on a 10 AWG copper conductor in a residential
dwelling according to NEC?
A. 1
B. 2
C. 3
D. 4
Rationale: NEC allows up to four 20-ampere circuits on 10 AWG
copper under standard residential load conditions.
2. In Alaska, a metallic raceway that is grounded at one end only is
considered:
A. Ungrounded
B. Grounded
C. Isolated
D. Bonded
Rationale: Per NEC and Alaska amendments, metallic raceways are
considered grounded if bonded at one end to the grounding system.
3. What is the minimum wire size for a 30-ampere branch circuit
supplying a 240V air conditioner?
A. 10 AWG
B. 10 AWG
C. 12 AWG
D. 14 AWG
,Rationale: According to NEC Table 310.15(B)(16), 10 AWG copper is
required for 30A circuits.
4. A dwelling unit requires at least one 20-ampere branch circuit to
supply:
A. Lighting
B. Small appliance outlets
C. HVAC
D. Water heater
Rationale: NEC 210.11(C)(1) requires at least two 20A small appliance
circuits in kitchens and dining areas.
5. The maximum length of a flexible cord run for a portable electric
heater is typically:
A. 10 feet
B. 12 feet
C. 15 feet
D. 25 feet
Rationale: NEC allows flexible cords for portable appliances up to 25
feet unless manufacturer specifies otherwise.
6. A GFCI is required for outlets in:
A. Bedrooms
B. Living rooms
C. Bathrooms
D. Attics
Rationale: NEC 210.8(A) requires GFCI protection in bathrooms,
kitchens, garages, and outdoors.
, 7. What is the NEC minimum height for service disconnecting
means above grade in Alaska?
A. 5 ft
B. 6 ft
C. 8 ft
D. 10 ft
Rationale: NEC 230.24 and Alaska amendments specify 8 feet
minimum for safety and access.
8. When installing a 3-phase, 4-wire feeder, the neutral conductor
must be:
A. Omitted
B. Grounded only at the source
C. Grounded at the source and connected at the panel
D. Connected only at the far end
Rationale: The neutral carries unbalanced current and must be
grounded at the source and connected at the panel.
9. What is the maximum ampacity for a 12 AWG copper conductor
in a dry location?
A. 15 A
B. 20 A
C. 25 A
D. 30 A
Rationale: NEC 310.15(B)(16) lists 12 AWG copper at 20A in dry
locations.
10. Aluminum conductors are preferred for:
A. Service entrance feeders
B. Branch circuits under 15A
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already Graded
A+
1. What is the maximum number of 20-ampere branch circuits that
can be installed on a 10 AWG copper conductor in a residential
dwelling according to NEC?
A. 1
B. 2
C. 3
D. 4
Rationale: NEC allows up to four 20-ampere circuits on 10 AWG
copper under standard residential load conditions.
2. In Alaska, a metallic raceway that is grounded at one end only is
considered:
A. Ungrounded
B. Grounded
C. Isolated
D. Bonded
Rationale: Per NEC and Alaska amendments, metallic raceways are
considered grounded if bonded at one end to the grounding system.
3. What is the minimum wire size for a 30-ampere branch circuit
supplying a 240V air conditioner?
A. 10 AWG
B. 10 AWG
C. 12 AWG
D. 14 AWG
,Rationale: According to NEC Table 310.15(B)(16), 10 AWG copper is
required for 30A circuits.
4. A dwelling unit requires at least one 20-ampere branch circuit to
supply:
A. Lighting
B. Small appliance outlets
C. HVAC
D. Water heater
Rationale: NEC 210.11(C)(1) requires at least two 20A small appliance
circuits in kitchens and dining areas.
5. The maximum length of a flexible cord run for a portable electric
heater is typically:
A. 10 feet
B. 12 feet
C. 15 feet
D. 25 feet
Rationale: NEC allows flexible cords for portable appliances up to 25
feet unless manufacturer specifies otherwise.
6. A GFCI is required for outlets in:
A. Bedrooms
B. Living rooms
C. Bathrooms
D. Attics
Rationale: NEC 210.8(A) requires GFCI protection in bathrooms,
kitchens, garages, and outdoors.
, 7. What is the NEC minimum height for service disconnecting
means above grade in Alaska?
A. 5 ft
B. 6 ft
C. 8 ft
D. 10 ft
Rationale: NEC 230.24 and Alaska amendments specify 8 feet
minimum for safety and access.
8. When installing a 3-phase, 4-wire feeder, the neutral conductor
must be:
A. Omitted
B. Grounded only at the source
C. Grounded at the source and connected at the panel
D. Connected only at the far end
Rationale: The neutral carries unbalanced current and must be
grounded at the source and connected at the panel.
9. What is the maximum ampacity for a 12 AWG copper conductor
in a dry location?
A. 15 A
B. 20 A
C. 25 A
D. 30 A
Rationale: NEC 310.15(B)(16) lists 12 AWG copper at 20A in dry
locations.
10. Aluminum conductors are preferred for:
A. Service entrance feeders
B. Branch circuits under 15A
