Electrician Apprenticeship Exam
(Advanced Level) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A
1. What is the primary purpose of bonding non–current-carrying
metal parts in an electrical system?
A. To reduce voltage drop
B. To provide a low-impedance path for fault current
C. To improve power factor
D. To balance load currents
Bonding ensures fault current has a safe path back to the source,
allowing overcurrent devices to operate properly.
2. In accordance with the Canadian Electrical Code (CEC), what is the
minimum working space depth required in front of electrical
equipment rated 600 V or less?
A. 600 mm
B. 1.0 m
C. 1.2 m
D. 1.5 m
The CEC specifies minimum clearances to ensure safe access and
maintenance.
3. What is the maximum allowable voltage drop recommended for
branch circuits supplying sensitive equipment?
A. 1%
, B. 2%
C. 3%
D. 5%
The CEC recommends limiting branch circuit voltage drop to 3% for
proper equipment operation.
4. Which type of transformer connection provides no phase shift
between primary and secondary?
A. Delta–wye
B. Wye–delta
C. Delta–delta
D. Open delta
A delta–delta transformer maintains the same phase relationship.
5. When sizing conductors for a continuous load, the load must be
calculated at what percentage?
A. 100%
B. 125%
C. 135%
D. 150%
Continuous loads must be calculated at 125% to prevent
overheating.
6. What is the primary function of a ground fault circuit interrupter
(GFCI)?
A. Protect equipment from overload
B. Protect people from electrical shock
C. Limit short-circuit current
D. Balance phase currents
, GFCIs detect current imbalance and quickly disconnect the circuit
to prevent shock.
7. In a three-phase, four-wire wye system, what is the relationship
between line voltage and phase voltage?
A. Line voltage equals phase voltage
B. Line voltage is half of phase voltage
C. Line voltage is √3 times phase voltage
D. Phase voltage is √3 times line voltage
This is a fundamental characteristic of wye-connected systems.
8. Which protective device is best suited for protecting
semiconductor equipment from short circuits?
A. Thermal breaker
B. Magnetic breaker
C. Current-limiting fuse
D. Time-delay fuse
Current-limiting fuses reduce peak fault current and protect
sensitive components.
9. What factor primarily determines the interrupting rating required
for a circuit breaker?
A. Load current
B. Available fault current
C. Voltage drop
D. Power factor
The breaker must safely interrupt the maximum possible fault
current.
10. Which motor starting method provides the greatest
reduction in starting current?
(Advanced Level) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A
1. What is the primary purpose of bonding non–current-carrying
metal parts in an electrical system?
A. To reduce voltage drop
B. To provide a low-impedance path for fault current
C. To improve power factor
D. To balance load currents
Bonding ensures fault current has a safe path back to the source,
allowing overcurrent devices to operate properly.
2. In accordance with the Canadian Electrical Code (CEC), what is the
minimum working space depth required in front of electrical
equipment rated 600 V or less?
A. 600 mm
B. 1.0 m
C. 1.2 m
D. 1.5 m
The CEC specifies minimum clearances to ensure safe access and
maintenance.
3. What is the maximum allowable voltage drop recommended for
branch circuits supplying sensitive equipment?
A. 1%
, B. 2%
C. 3%
D. 5%
The CEC recommends limiting branch circuit voltage drop to 3% for
proper equipment operation.
4. Which type of transformer connection provides no phase shift
between primary and secondary?
A. Delta–wye
B. Wye–delta
C. Delta–delta
D. Open delta
A delta–delta transformer maintains the same phase relationship.
5. When sizing conductors for a continuous load, the load must be
calculated at what percentage?
A. 100%
B. 125%
C. 135%
D. 150%
Continuous loads must be calculated at 125% to prevent
overheating.
6. What is the primary function of a ground fault circuit interrupter
(GFCI)?
A. Protect equipment from overload
B. Protect people from electrical shock
C. Limit short-circuit current
D. Balance phase currents
, GFCIs detect current imbalance and quickly disconnect the circuit
to prevent shock.
7. In a three-phase, four-wire wye system, what is the relationship
between line voltage and phase voltage?
A. Line voltage equals phase voltage
B. Line voltage is half of phase voltage
C. Line voltage is √3 times phase voltage
D. Phase voltage is √3 times line voltage
This is a fundamental characteristic of wye-connected systems.
8. Which protective device is best suited for protecting
semiconductor equipment from short circuits?
A. Thermal breaker
B. Magnetic breaker
C. Current-limiting fuse
D. Time-delay fuse
Current-limiting fuses reduce peak fault current and protect
sensitive components.
9. What factor primarily determines the interrupting rating required
for a circuit breaker?
A. Load current
B. Available fault current
C. Voltage drop
D. Power factor
The breaker must safely interrupt the maximum possible fault
current.
10. Which motor starting method provides the greatest
reduction in starting current?
