ALBERTA ELECTRICIAN FOURTH PERIOD AIT EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |INSTANT
DOWNLOAD PDF
1. What is the main purpose of a ground fault circuit
interrupter (GFCI)?
A. To prevent overloading circuits
B. To protect equipment from voltage spikes
C. To protect people from electrical shock
D. To maintain voltage stability
Rationale: A GFCI monitors current imbalance between hot and
neutral wires. If there is a difference (like current leaking to
ground through a person), it trips instantly.
Correct Answer: C. To protect people from electrical shock
2. Which of the following is considered a hazardous location in
electrical installations?
A. Residential living rooms
B. Areas with flammable gases or vapors
C. Offices with computers
D. Outdoor gardens
,Rationale: Hazardous locations are defined by the presence of
flammable gases, vapors, or combustible dust. These require
special wiring methods.
Correct Answer: B. Areas with flammable gases or vapors
3. What does NEC stand for in electrical standards?
A. National Electrical Code
B. Neutral Earth Conductor
C. National Equipment Certification
D. No Electrical Charge
Rationale: The NEC provides safety standards for electrical
installations in North America.
Correct Answer: A. National Electrical Code
4. Which conductor color is typically used for grounding in
Alberta residential wiring?
A. Black
B. White
C. Green or bare
D. Red
Rationale: Grounding conductors are usually green or bare
copper to distinguish them from current-carrying conductors.
Correct Answer: C. Green or bare
,5. A 15-amp circuit has a continuous load of 12 amps. What is
the maximum allowable continuous load according to code?
A. 10 amps
B. 12 amps
C. 15 amps
D. 16 amps
Rationale: Continuous loads should not exceed 80% of the
circuit rating. 80% of 15 A = 12 A.
Correct Answer: B. 12 amps
6. What is the purpose of a bonding jumper in electrical
systems?
A. To carry current under normal operation
B. To maintain voltage levels
C. To connect non-current-carrying metal parts to ground
D. To reduce resistance in the circuit
Rationale: Bonding jumpers ensure all metal parts are at the
same potential to reduce shock hazards.
Correct Answer: C. To connect non-current-carrying metal parts
to ground
, 7. Which of the following is an advantage of using copper over
aluminum conductors?
A. Lower cost
B. Higher resistance
C. Better conductivity and mechanical strength
D. Lighter weight
Rationale: Copper has higher conductivity and mechanical
strength than aluminum, making it ideal for most installations.
Correct Answer: C. Better conductivity and mechanical strength
8. In a three-phase, 4-wire system, the voltage between any
two phases is:
A. Equal to the phase voltage
B. 1.732 times the phase voltage
C. Half the phase voltage
D. Double the phase voltage
Rationale: In a balanced three-phase system, line-to-line
voltage = √3 × phase voltage.
Correct Answer: B. 1.732 times the phase voltage
9. Which type of conduit is preferred for wet locations?
A. EMT (Electrical Metallic Tubing)
B. PVC (Polyvinyl Chloride)
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |INSTANT
DOWNLOAD PDF
1. What is the main purpose of a ground fault circuit
interrupter (GFCI)?
A. To prevent overloading circuits
B. To protect equipment from voltage spikes
C. To protect people from electrical shock
D. To maintain voltage stability
Rationale: A GFCI monitors current imbalance between hot and
neutral wires. If there is a difference (like current leaking to
ground through a person), it trips instantly.
Correct Answer: C. To protect people from electrical shock
2. Which of the following is considered a hazardous location in
electrical installations?
A. Residential living rooms
B. Areas with flammable gases or vapors
C. Offices with computers
D. Outdoor gardens
,Rationale: Hazardous locations are defined by the presence of
flammable gases, vapors, or combustible dust. These require
special wiring methods.
Correct Answer: B. Areas with flammable gases or vapors
3. What does NEC stand for in electrical standards?
A. National Electrical Code
B. Neutral Earth Conductor
C. National Equipment Certification
D. No Electrical Charge
Rationale: The NEC provides safety standards for electrical
installations in North America.
Correct Answer: A. National Electrical Code
4. Which conductor color is typically used for grounding in
Alberta residential wiring?
A. Black
B. White
C. Green or bare
D. Red
Rationale: Grounding conductors are usually green or bare
copper to distinguish them from current-carrying conductors.
Correct Answer: C. Green or bare
,5. A 15-amp circuit has a continuous load of 12 amps. What is
the maximum allowable continuous load according to code?
A. 10 amps
B. 12 amps
C. 15 amps
D. 16 amps
Rationale: Continuous loads should not exceed 80% of the
circuit rating. 80% of 15 A = 12 A.
Correct Answer: B. 12 amps
6. What is the purpose of a bonding jumper in electrical
systems?
A. To carry current under normal operation
B. To maintain voltage levels
C. To connect non-current-carrying metal parts to ground
D. To reduce resistance in the circuit
Rationale: Bonding jumpers ensure all metal parts are at the
same potential to reduce shock hazards.
Correct Answer: C. To connect non-current-carrying metal parts
to ground
, 7. Which of the following is an advantage of using copper over
aluminum conductors?
A. Lower cost
B. Higher resistance
C. Better conductivity and mechanical strength
D. Lighter weight
Rationale: Copper has higher conductivity and mechanical
strength than aluminum, making it ideal for most installations.
Correct Answer: C. Better conductivity and mechanical strength
8. In a three-phase, 4-wire system, the voltage between any
two phases is:
A. Equal to the phase voltage
B. 1.732 times the phase voltage
C. Half the phase voltage
D. Double the phase voltage
Rationale: In a balanced three-phase system, line-to-line
voltage = √3 × phase voltage.
Correct Answer: B. 1.732 times the phase voltage
9. Which type of conduit is preferred for wet locations?
A. EMT (Electrical Metallic Tubing)
B. PVC (Polyvinyl Chloride)
