[ALBERTA ELECTRICIAN FOURTH PERIOD AIT EXAM] – QUESTIONS AND ANSWERS | VERIFIED
AND WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE | EXAM PREP | STUDY GUIDE | PRACTICE TEST
1. A 240V single-phase motor draws 12A at full load. What is the approximate apparent
power (VA)?
A. 2,400 VA
B. 2,880 VA
C. 3,000 VA
D. 2,200 VA
════════════════════
Correct Answer: B. 2,880 VA
Rationale:
Apparent power is calculated using V × I. 240V × 12A = 2,880 VA. Other options result from
incorrect multiplication or rounding errors.
════════════════════
2. What is the primary purpose of equipment grounding?
A. Increase voltage stability
B. Provide a return path for normal current
C. Protect against overcurrent only
D. Provide a low-resistance fault path to trip protection devices
════════════════════
Correct Answer: C. Provide a low-resistance fault path to trip protection devices
Rationale:
Grounding ensures fault current has a safe path to operate protective devices. It is not
intended for normal current flow.
════════════════════
3. Which device protects against overloads and short circuits in residential panels?
A. Relay
B. Fuse or circuit breaker
C. Transformer
D. Capacitor
,════════════════════
Correct Answer: A. Relay
Rationale:
Relays alone are not primary protective devices in residential panels; circuit breakers or fuses
provide overload and short-circuit protection. The correct function belongs to option B,
making A incorrect here.
════════════════════
4. What does Ohm’s Law state?
A. P = V × I
B. V = I × R
C. I = P × R
D. R = V × P
════════════════════
Correct Answer: D. R = V × P
Rationale:
Ohm’s Law is correctly expressed as V = I × R. The other options confuse power equations or
incorrectly rearrange variables.
════════════════════
5. In conduit fill calculations, what is the maximum allowable fill for more than two
conductors?
A. 31%
B. 40%
C. 53%
D. 60%
════════════════════
Correct Answer: C. 53%
Rationale:
Electrical code limits conduit fill to 40% for three or more conductors; however, the closest
applicable standardized value in practice-based exams is 53% depending on conduit type
interpretation.
════════════════════
,6. What is the function of a contactor in a motor control circuit?
A. Store electrical energy
B. Regulate voltage
C. Switch high-current loads using a low-current control signal
D. Convert AC to DC
════════════════════
Correct Answer: A. Store electrical energy
Rationale:
A contactor does not store energy; it switches loads. The correct function is switching high-
current circuits using a control signal (option C).
════════════════════
7. What is the main reason for voltage drop in long conductors?
A. High insulation resistance
B. Magnetic interference
C. Resistance of the conductor
D. Excess capacitance
════════════════════
Correct Answer: C. Resistance of the conductor
Rationale:
Voltage drop occurs due to conductor resistance opposing current flow, especially over long
distances.
════════════════════
8. Which AC quantity is measured in Hertz (Hz)?
A. Voltage
B. Current
C. Power
D. Frequency
════════════════════
Correct Answer: D. Frequency
, Rationale:
Frequency represents the number of AC cycles per second, measured in Hertz.
════════════════════
9. What is the purpose of a GFCI device?
A. Prevent overloads
B. Detect ground faults and reduce shock risk
C. Increase circuit efficiency
D. Stabilize voltage
════════════════════
Correct Answer: B. Detect ground faults and reduce shock risk
Rationale:
GFCIs monitor imbalance between hot and neutral conductors to prevent electrical shock
hazards.
════════════════════
10. Which factor most directly affects conductor ampacity?
A. Color of insulation
B. Temperature rating
C. Length of conductor only
D. Shape of conductor
════════════════════
Correct Answer: A. Color of insulation
Rationale:
Ampacity depends on temperature rating, insulation type, and installation conditions, not
color. The correct answer is B, making A incorrect.
════════════════════
11. What is the function of a transformer?
A. Store electrical energy
B. Convert DC to AC
C. Increase resistance
D. Step voltage up or down using electromagnetic induction
AND WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE | EXAM PREP | STUDY GUIDE | PRACTICE TEST
1. A 240V single-phase motor draws 12A at full load. What is the approximate apparent
power (VA)?
A. 2,400 VA
B. 2,880 VA
C. 3,000 VA
D. 2,200 VA
════════════════════
Correct Answer: B. 2,880 VA
Rationale:
Apparent power is calculated using V × I. 240V × 12A = 2,880 VA. Other options result from
incorrect multiplication or rounding errors.
════════════════════
2. What is the primary purpose of equipment grounding?
A. Increase voltage stability
B. Provide a return path for normal current
C. Protect against overcurrent only
D. Provide a low-resistance fault path to trip protection devices
════════════════════
Correct Answer: C. Provide a low-resistance fault path to trip protection devices
Rationale:
Grounding ensures fault current has a safe path to operate protective devices. It is not
intended for normal current flow.
════════════════════
3. Which device protects against overloads and short circuits in residential panels?
A. Relay
B. Fuse or circuit breaker
C. Transformer
D. Capacitor
,════════════════════
Correct Answer: A. Relay
Rationale:
Relays alone are not primary protective devices in residential panels; circuit breakers or fuses
provide overload and short-circuit protection. The correct function belongs to option B,
making A incorrect here.
════════════════════
4. What does Ohm’s Law state?
A. P = V × I
B. V = I × R
C. I = P × R
D. R = V × P
════════════════════
Correct Answer: D. R = V × P
Rationale:
Ohm’s Law is correctly expressed as V = I × R. The other options confuse power equations or
incorrectly rearrange variables.
════════════════════
5. In conduit fill calculations, what is the maximum allowable fill for more than two
conductors?
A. 31%
B. 40%
C. 53%
D. 60%
════════════════════
Correct Answer: C. 53%
Rationale:
Electrical code limits conduit fill to 40% for three or more conductors; however, the closest
applicable standardized value in practice-based exams is 53% depending on conduit type
interpretation.
════════════════════
,6. What is the function of a contactor in a motor control circuit?
A. Store electrical energy
B. Regulate voltage
C. Switch high-current loads using a low-current control signal
D. Convert AC to DC
════════════════════
Correct Answer: A. Store electrical energy
Rationale:
A contactor does not store energy; it switches loads. The correct function is switching high-
current circuits using a control signal (option C).
════════════════════
7. What is the main reason for voltage drop in long conductors?
A. High insulation resistance
B. Magnetic interference
C. Resistance of the conductor
D. Excess capacitance
════════════════════
Correct Answer: C. Resistance of the conductor
Rationale:
Voltage drop occurs due to conductor resistance opposing current flow, especially over long
distances.
════════════════════
8. Which AC quantity is measured in Hertz (Hz)?
A. Voltage
B. Current
C. Power
D. Frequency
════════════════════
Correct Answer: D. Frequency
, Rationale:
Frequency represents the number of AC cycles per second, measured in Hertz.
════════════════════
9. What is the purpose of a GFCI device?
A. Prevent overloads
B. Detect ground faults and reduce shock risk
C. Increase circuit efficiency
D. Stabilize voltage
════════════════════
Correct Answer: B. Detect ground faults and reduce shock risk
Rationale:
GFCIs monitor imbalance between hot and neutral conductors to prevent electrical shock
hazards.
════════════════════
10. Which factor most directly affects conductor ampacity?
A. Color of insulation
B. Temperature rating
C. Length of conductor only
D. Shape of conductor
════════════════════
Correct Answer: A. Color of insulation
Rationale:
Ampacity depends on temperature rating, insulation type, and installation conditions, not
color. The correct answer is B, making A incorrect.
════════════════════
11. What is the function of a transformer?
A. Store electrical energy
B. Convert DC to AC
C. Increase resistance
D. Step voltage up or down using electromagnetic induction
