[ALBERTA ELECTRICIAN SECOND 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 technician measures 12V across a resistor with a current of 3A flowing through it. What is
the resistance value?
A. 2Ω
B. 4Ω
C. 6Ω
D. 36Ω
════════════════════
Correct Answer: B. 4Ω
Rationale:
Applying Ohm’s Law (R = V ÷ I), 12V ÷ 3A = 4Ω. The other options result from incorrect division
or multiplication of values.
════════════════════
2. Which device is primarily used to protect a circuit from overcurrent?
A. Transformer
B. Circuit breaker
C. Resistor
D. Capacitor
════════════════════
Correct Answer: B. Circuit breaker
Rationale:
A circuit breaker automatically interrupts current flow during overloads or faults, protecting
wiring and equipment. The other components do not provide overcurrent protection.
════════════════════
3. In a series circuit, what remains constant throughout all components?
A. Voltage
B. Current
C. Resistance
D. Power
,════════════════════
Correct Answer: B. Current
Rationale:
In series circuits, current remains constant while voltage divides across components. The other
options vary depending on resistance values.
════════════════════
4. What is the primary purpose of a ground wire in residential wiring?
A. Carry load current
B. Increase voltage stability
C. Provide a fault path to earth
D. Reduce resistance in conductors
════════════════════
Correct Answer: C. Provide a fault path to earth
Rationale:
Grounding ensures fault current safely travels to earth, triggering protective devices. It is not
intended to carry normal load current.
════════════════════
5. A motor rated at 240V draws 10A. What is its power consumption?
A. 240W
B. 1200W
C. 2400W
D. 24000W
════════════════════
Correct Answer: C. 2400W
Rationale:
Using P = V × I, 240 × 10 = 2400W. Other answers reflect incorrect multiplication or unit errors.
════════════════════
6. Which material is commonly used for electrical conductors due to high conductivity?
A. Copper
,B. Rubber
C. Glass
D. PVC
════════════════════
Correct Answer: A. Copper
Rationale:
Copper offers excellent conductivity and durability, making it standard in electrical wiring.
Other materials are insulators.
════════════════════
7. What does a GFCI outlet primarily protect against?
A. Overvoltage
B. Short circuits
C. Ground faults
D. Overheating
════════════════════
Correct Answer: C. Ground faults
Rationale:
GFCIs detect leakage current to ground and shut off power quickly to prevent shock hazards.
════════════════════
8. In AC systems, what does frequency represent?
A. Voltage level
B. Number of cycles per second
C. Current flow rate
D. Resistance level
════════════════════
Correct Answer: B. Number of cycles per second
Rationale:
Frequency is measured in hertz and defines how many AC cycles occur per second.
════════════════════
, 9. Which tool is used to measure insulation resistance?
A. Multimeter
B. Clamp meter
C. Megohmmeter
D. Voltmeter
════════════════════
Correct Answer: C. Megohmmeter
Rationale:
A megohmmeter applies high voltage to test insulation integrity. Standard meters cannot
measure insulation resistance accurately.
════════════════════
10. What is the function of a relay in an electrical system?
A. Store energy
B. Step down voltage
C. Electrically control a circuit
D. Increase resistance
════════════════════
Correct Answer: C. Electrically control a circuit
Rationale:
Relays use a small control current to operate larger loads, enabling safe switching of circuits.
════════════════════
11. Which of the following best defines voltage?
A. Flow of electrons
B. Resistance to current
C. Electrical pressure
D. Power consumption
════════════════════
Correct Answer: C. Electrical pressure
Rationale:
Voltage is the potential difference that drives current through a circuit.
════════════════════
AND WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE | EXAM PREP | STUDY GUIDE | PRACTICE TEST
1. A technician measures 12V across a resistor with a current of 3A flowing through it. What is
the resistance value?
A. 2Ω
B. 4Ω
C. 6Ω
D. 36Ω
════════════════════
Correct Answer: B. 4Ω
Rationale:
Applying Ohm’s Law (R = V ÷ I), 12V ÷ 3A = 4Ω. The other options result from incorrect division
or multiplication of values.
════════════════════
2. Which device is primarily used to protect a circuit from overcurrent?
A. Transformer
B. Circuit breaker
C. Resistor
D. Capacitor
════════════════════
Correct Answer: B. Circuit breaker
Rationale:
A circuit breaker automatically interrupts current flow during overloads or faults, protecting
wiring and equipment. The other components do not provide overcurrent protection.
════════════════════
3. In a series circuit, what remains constant throughout all components?
A. Voltage
B. Current
C. Resistance
D. Power
,════════════════════
Correct Answer: B. Current
Rationale:
In series circuits, current remains constant while voltage divides across components. The other
options vary depending on resistance values.
════════════════════
4. What is the primary purpose of a ground wire in residential wiring?
A. Carry load current
B. Increase voltage stability
C. Provide a fault path to earth
D. Reduce resistance in conductors
════════════════════
Correct Answer: C. Provide a fault path to earth
Rationale:
Grounding ensures fault current safely travels to earth, triggering protective devices. It is not
intended to carry normal load current.
════════════════════
5. A motor rated at 240V draws 10A. What is its power consumption?
A. 240W
B. 1200W
C. 2400W
D. 24000W
════════════════════
Correct Answer: C. 2400W
Rationale:
Using P = V × I, 240 × 10 = 2400W. Other answers reflect incorrect multiplication or unit errors.
════════════════════
6. Which material is commonly used for electrical conductors due to high conductivity?
A. Copper
,B. Rubber
C. Glass
D. PVC
════════════════════
Correct Answer: A. Copper
Rationale:
Copper offers excellent conductivity and durability, making it standard in electrical wiring.
Other materials are insulators.
════════════════════
7. What does a GFCI outlet primarily protect against?
A. Overvoltage
B. Short circuits
C. Ground faults
D. Overheating
════════════════════
Correct Answer: C. Ground faults
Rationale:
GFCIs detect leakage current to ground and shut off power quickly to prevent shock hazards.
════════════════════
8. In AC systems, what does frequency represent?
A. Voltage level
B. Number of cycles per second
C. Current flow rate
D. Resistance level
════════════════════
Correct Answer: B. Number of cycles per second
Rationale:
Frequency is measured in hertz and defines how many AC cycles occur per second.
════════════════════
, 9. Which tool is used to measure insulation resistance?
A. Multimeter
B. Clamp meter
C. Megohmmeter
D. Voltmeter
════════════════════
Correct Answer: C. Megohmmeter
Rationale:
A megohmmeter applies high voltage to test insulation integrity. Standard meters cannot
measure insulation resistance accurately.
════════════════════
10. What is the function of a relay in an electrical system?
A. Store energy
B. Step down voltage
C. Electrically control a circuit
D. Increase resistance
════════════════════
Correct Answer: C. Electrically control a circuit
Rationale:
Relays use a small control current to operate larger loads, enabling safe switching of circuits.
════════════════════
11. Which of the following best defines voltage?
A. Flow of electrons
B. Resistance to current
C. Electrical pressure
D. Power consumption
════════════════════
Correct Answer: C. Electrical pressure
Rationale:
Voltage is the potential difference that drives current through a circuit.
════════════════════
