ALBERTA ELECTRICIAN SECOND PERIOD AIT EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |INSTANT
DOWNLOAD PDF
1. Which of the following is a common cause of electrical
shock in residential wiring?
A. Damaged insulation
B. Overloaded circuits
C. Wet conditions
D. Proper grounding
Rationale:
• A: Damaged insulation exposes conductors → can cause
shock.
• B: Overloaded circuits cause overheating but not
necessarily direct shock.
• C: Wet conditions lower resistance → increase risk of
shock.
• D: Proper grounding protects users → reduces shock risk.
Answer: A, C
2. What is the primary purpose of the neutral conductor in AC
wiring?
,A. Carry return current to the source
B. Protect against electrical faults
C. Provide grounding for safety
D. Limit voltage in the circuit
Rationale:
• A: Neutral provides a return path for current.
• B: Ground protects against faults, not neutral.
• C: Grounding is separate from neutral.
• D: Voltage limitation is handled by devices, not neutral.
Answer: A
3. According to the Canadian Electrical Code (CEC), what is the
minimum wire gauge for a 20A branch circuit in residential
wiring?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
Rationale:
• A: 14 AWG rated for 15A
• B: 12 AWG rated for 20A → correct for 20A circuits
• C: 10 AWG rated for 30A
• D: 8 AWG rated for 40–55A
,Answer: B
4. What is the main function of a GFCI (Ground Fault Circuit
Interrupter)?
A. Protect equipment from overload
B. Protect against short circuits
C. Protect people from electrical shock
D. Reduce power loss
Rationale:
• A: Overload protection is the role of a breaker.
• B: Short-circuit protection is handled by fuses or breakers.
• C: GFCI detects current leakage to ground → prevents
shock.
• D: Not related to power loss.
Answer: C
5. Which of the following materials is commonly used for
electrical wiring conductors?
A. Aluminum
B. Copper
C. Steel
D. PVC
Rationale:
, • A: Aluminum is sometimes used for large wires.
• B: Copper is highly conductive → most common.
• C: Steel is used for structural, not typical conductors.
• D: PVC is an insulator, not a conductor.
Answer: A, B
6. In a 120/240V single-phase system, what is the voltage
between the two hot conductors?
A. 120V
B. 240V
C. 60V
D. 480V
Rationale:
• A: Voltage from hot to neutral is 120V.
• B: Voltage between the two hots = 240V.
• C: 60V not applicable.
• D: 480V not correct for standard residential.
Answer: B
7. What is the color code for a ground conductor in Canadian
residential wiring?
A. Black
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |INSTANT
DOWNLOAD PDF
1. Which of the following is a common cause of electrical
shock in residential wiring?
A. Damaged insulation
B. Overloaded circuits
C. Wet conditions
D. Proper grounding
Rationale:
• A: Damaged insulation exposes conductors → can cause
shock.
• B: Overloaded circuits cause overheating but not
necessarily direct shock.
• C: Wet conditions lower resistance → increase risk of
shock.
• D: Proper grounding protects users → reduces shock risk.
Answer: A, C
2. What is the primary purpose of the neutral conductor in AC
wiring?
,A. Carry return current to the source
B. Protect against electrical faults
C. Provide grounding for safety
D. Limit voltage in the circuit
Rationale:
• A: Neutral provides a return path for current.
• B: Ground protects against faults, not neutral.
• C: Grounding is separate from neutral.
• D: Voltage limitation is handled by devices, not neutral.
Answer: A
3. According to the Canadian Electrical Code (CEC), what is the
minimum wire gauge for a 20A branch circuit in residential
wiring?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
Rationale:
• A: 14 AWG rated for 15A
• B: 12 AWG rated for 20A → correct for 20A circuits
• C: 10 AWG rated for 30A
• D: 8 AWG rated for 40–55A
,Answer: B
4. What is the main function of a GFCI (Ground Fault Circuit
Interrupter)?
A. Protect equipment from overload
B. Protect against short circuits
C. Protect people from electrical shock
D. Reduce power loss
Rationale:
• A: Overload protection is the role of a breaker.
• B: Short-circuit protection is handled by fuses or breakers.
• C: GFCI detects current leakage to ground → prevents
shock.
• D: Not related to power loss.
Answer: C
5. Which of the following materials is commonly used for
electrical wiring conductors?
A. Aluminum
B. Copper
C. Steel
D. PVC
Rationale:
, • A: Aluminum is sometimes used for large wires.
• B: Copper is highly conductive → most common.
• C: Steel is used for structural, not typical conductors.
• D: PVC is an insulator, not a conductor.
Answer: A, B
6. In a 120/240V single-phase system, what is the voltage
between the two hot conductors?
A. 120V
B. 240V
C. 60V
D. 480V
Rationale:
• A: Voltage from hot to neutral is 120V.
• B: Voltage between the two hots = 240V.
• C: 60V not applicable.
• D: 480V not correct for standard residential.
Answer: B
7. What is the color code for a ground conductor in Canadian
residential wiring?
A. Black
