ALBERTA ELECTRICIAN APPRENTICESHIP
Certification Practice Exam 2Questions
and Answers with Rationales Latest
Version Top Rated
Question 1
An electrician installs four current-carrying conductors in a raceway. According to
the Canadian Electrical Code (CEC), what must be considered?
A. Conductor color only
B. Conductor ampacity adjustment (derating)
C. Ground resistance only
D. Motor efficiency
✅ Correct Answer: B. Conductor ampacity adjustment (derating)
Rationale
When more than three current-carrying conductors are installed together in a
raceway or cable, the CEC requires consideration of conductor ampacity
adjustment (derating) because heat dissipation is reduced.
Question 2
A 600 V, three-phase motor has a nameplate rating of 15 hp, 18 A, and 0.88
power factor. Which value is primarily used when selecting the overload relay
setting?
A. Horsepower only
B. Power factor
,C. Nameplate full-load current
D. Supply voltage only
✅ Correct Answer: C. Nameplate full-load current
Rationale
Overload protection is primarily based on the motor nameplate full-load current
(FLC) and applicable CEC requirements. Horsepower and power factor help
describe performance but are not the primary values used for overload settings.
Question 3
A transformer has a primary voltage of 600 V and a secondary voltage of 240 V.
What type of transformer is this?
A. Step-up transformer
B. Step-down transformer
C. Isolation amplifier
D. Current transformer
✅ Correct Answer: B. Step-down transformer
Rationale
A transformer that reduces voltage from 600 V to 240 V is a step-down
transformer. These are commonly used to supply equipment requiring a lower
operating voltage.
Question 4
What is the safest method for confirming that an electrical circuit is de-energized
before beginning work?
,A. Assume the disconnect removed all power.
B. Ask another worker if the circuit is off.
C. Verify the absence of voltage with an approved tester after lockout/tagout.
D. Touch the conductors while wearing insulated gloves.
✅ Correct Answer: C. Verify the absence of voltage with an approved tester
after lockout/tagout.
Rationale
The accepted sequence is:
1. De-energize the equipment.
2. Apply lockout/tagout.
3. Verify the absence of voltage using a properly rated test instrument.
4. Begin work.
Never rely solely on labels or assumptions.
Question 5
A 240 V heater draws 25 A. What is its power consumption?
A. 3.6 kW
B. 5.0 kW
C. 6.0 kW
D. 7.2 kW
✅ Correct Answer: C. 6.0 kW
Rationale
, [
P = V \times I
]
[
P = 240 \times 25 = 6000\text{ W}
]
= 6.0 kW
Question 6
Which instrument is specifically designed to determine the phase sequence of a
three-phase system?
A. Clamp-on ammeter
B. Phase rotation meter
C. Megohmmeter
D. Ohmmeter
✅ Correct Answer: B. Phase rotation meter
Rationale
A phase rotation meter identifies the order of the phases (ABC or ACB), allowing
electricians to verify correct motor rotation before startup.
Question 7
A motor starts normally but overheats after running for 30 minutes. Which
condition is the most likely cause?
A. Defective start capacitor
B. Sustained mechanical overload
Certification Practice Exam 2Questions
and Answers with Rationales Latest
Version Top Rated
Question 1
An electrician installs four current-carrying conductors in a raceway. According to
the Canadian Electrical Code (CEC), what must be considered?
A. Conductor color only
B. Conductor ampacity adjustment (derating)
C. Ground resistance only
D. Motor efficiency
✅ Correct Answer: B. Conductor ampacity adjustment (derating)
Rationale
When more than three current-carrying conductors are installed together in a
raceway or cable, the CEC requires consideration of conductor ampacity
adjustment (derating) because heat dissipation is reduced.
Question 2
A 600 V, three-phase motor has a nameplate rating of 15 hp, 18 A, and 0.88
power factor. Which value is primarily used when selecting the overload relay
setting?
A. Horsepower only
B. Power factor
,C. Nameplate full-load current
D. Supply voltage only
✅ Correct Answer: C. Nameplate full-load current
Rationale
Overload protection is primarily based on the motor nameplate full-load current
(FLC) and applicable CEC requirements. Horsepower and power factor help
describe performance but are not the primary values used for overload settings.
Question 3
A transformer has a primary voltage of 600 V and a secondary voltage of 240 V.
What type of transformer is this?
A. Step-up transformer
B. Step-down transformer
C. Isolation amplifier
D. Current transformer
✅ Correct Answer: B. Step-down transformer
Rationale
A transformer that reduces voltage from 600 V to 240 V is a step-down
transformer. These are commonly used to supply equipment requiring a lower
operating voltage.
Question 4
What is the safest method for confirming that an electrical circuit is de-energized
before beginning work?
,A. Assume the disconnect removed all power.
B. Ask another worker if the circuit is off.
C. Verify the absence of voltage with an approved tester after lockout/tagout.
D. Touch the conductors while wearing insulated gloves.
✅ Correct Answer: C. Verify the absence of voltage with an approved tester
after lockout/tagout.
Rationale
The accepted sequence is:
1. De-energize the equipment.
2. Apply lockout/tagout.
3. Verify the absence of voltage using a properly rated test instrument.
4. Begin work.
Never rely solely on labels or assumptions.
Question 5
A 240 V heater draws 25 A. What is its power consumption?
A. 3.6 kW
B. 5.0 kW
C. 6.0 kW
D. 7.2 kW
✅ Correct Answer: C. 6.0 kW
Rationale
, [
P = V \times I
]
[
P = 240 \times 25 = 6000\text{ W}
]
= 6.0 kW
Question 6
Which instrument is specifically designed to determine the phase sequence of a
three-phase system?
A. Clamp-on ammeter
B. Phase rotation meter
C. Megohmmeter
D. Ohmmeter
✅ Correct Answer: B. Phase rotation meter
Rationale
A phase rotation meter identifies the order of the phases (ABC or ACB), allowing
electricians to verify correct motor rotation before startup.
Question 7
A motor starts normally but overheats after running for 30 minutes. Which
condition is the most likely cause?
A. Defective start capacitor
B. Sustained mechanical overload
