Ontario Electrician Licensing Exam
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
Pdf
1. What is the primary purpose of the Ontario Electrical Safety Code?
A. To regulate plumbing systems
B. To ensure safe installation and maintenance of electrical equipment
C. To control building aesthetics
D. To manage electrical billing
Answer: To ensure safe installation and maintenance of electrical equipment
Rationale: The Ontario Electrical Safety Code establishes safety standards to
protect people and property from electrical hazards.
2. What does GFCI stand for?
A. Ground Fault Current Indicator
B. Ground Fault Circuit Interrupter
C. General Fault Circuit Interrupter
D. Grounded Fault Control Interface
Answer: Ground Fault Circuit Interrupter
Rationale: GFCIs protect against electric shock by interrupting current when a
ground fault is detected.
, 3. What is the standard voltage for residential outlets in Ontario?
A. 110V
B. 115V
C. 120V
D. 240V
Answer: 120V
Rationale: Residential outlets in Ontario typically supply 120 volts for standard
use.
4. Which conductor is typically colored green or bare?
A. Neutral
B. Hot
C. Ground
D. Load
Answer: Ground
Rationale: Ground conductors are green or bare to provide a safe path for fault
current.
5. What device protects circuits from overload?
A. Switch
B. Fuse or circuit breaker
C. Transformer
D. Capacitor
Answer: Fuse or circuit breaker
Rationale: These devices interrupt current when it exceeds safe levels,
preventing overheating and fire.
6. What is Ohm’s Law?
A. V = IR
B. P = IV
C. I = PR
D. R = VI
, Answer: V = IR
Rationale: Ohm’s Law relates voltage, current, and resistance in a circuit.
7. What does the neutral conductor do?
A. Supplies power
B. Returns current to the source
C. Grounds the system
D. Controls voltage
Answer: Returns current to the source
Rationale: The neutral completes the circuit by carrying current back to the
source.
8. What is the minimum burial depth for direct burial cable (general rule)?
A. 300 mm
B. 450 mm
C. 600 mm
D. 900 mm
Answer: 600 mm
Rationale: Typical code requirement for direct burial cable is around 600 mm for
protection.
9. What tool measures voltage?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: Voltmeter
Rationale: Voltmeters measure electrical potential difference.
10.What is the function of a transformer?
A. Increase resistance
B. Convert AC to DC
C. Change voltage levels
D. Store energy
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. What is the primary purpose of the Ontario Electrical Safety Code?
A. To regulate plumbing systems
B. To ensure safe installation and maintenance of electrical equipment
C. To control building aesthetics
D. To manage electrical billing
Answer: To ensure safe installation and maintenance of electrical equipment
Rationale: The Ontario Electrical Safety Code establishes safety standards to
protect people and property from electrical hazards.
2. What does GFCI stand for?
A. Ground Fault Current Indicator
B. Ground Fault Circuit Interrupter
C. General Fault Circuit Interrupter
D. Grounded Fault Control Interface
Answer: Ground Fault Circuit Interrupter
Rationale: GFCIs protect against electric shock by interrupting current when a
ground fault is detected.
, 3. What is the standard voltage for residential outlets in Ontario?
A. 110V
B. 115V
C. 120V
D. 240V
Answer: 120V
Rationale: Residential outlets in Ontario typically supply 120 volts for standard
use.
4. Which conductor is typically colored green or bare?
A. Neutral
B. Hot
C. Ground
D. Load
Answer: Ground
Rationale: Ground conductors are green or bare to provide a safe path for fault
current.
5. What device protects circuits from overload?
A. Switch
B. Fuse or circuit breaker
C. Transformer
D. Capacitor
Answer: Fuse or circuit breaker
Rationale: These devices interrupt current when it exceeds safe levels,
preventing overheating and fire.
6. What is Ohm’s Law?
A. V = IR
B. P = IV
C. I = PR
D. R = VI
, Answer: V = IR
Rationale: Ohm’s Law relates voltage, current, and resistance in a circuit.
7. What does the neutral conductor do?
A. Supplies power
B. Returns current to the source
C. Grounds the system
D. Controls voltage
Answer: Returns current to the source
Rationale: The neutral completes the circuit by carrying current back to the
source.
8. What is the minimum burial depth for direct burial cable (general rule)?
A. 300 mm
B. 450 mm
C. 600 mm
D. 900 mm
Answer: 600 mm
Rationale: Typical code requirement for direct burial cable is around 600 mm for
protection.
9. What tool measures voltage?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: Voltmeter
Rationale: Voltmeters measure electrical potential difference.
10.What is the function of a transformer?
A. Increase resistance
B. Convert AC to DC
C. Change voltage levels
D. Store energy
