ALBERTA MASTER ELECTRICIAN
CERTIFICATION PRACTICE
EXAM
150-Question Comprehensive Mock
Exam (CEC-Based) with Step-by-Step
Solutions
1. Voltage Drop Calculation
A 240 V circuit supplies a 10 kW load at 50 m. If conductor resistance causes a 3% voltage drop,
what is the approximate load voltage?
A. 240 V
B. 233 V
C. 227 V
D. 220 V
✅ Answer: B. 233 V
2. CEC Rule Application
According to the Canadian Electrical Code, which conductor is typically permitted as a bonding
conductor?
A. Aluminum conductor with insulation
B. Bare copper conductor
C. Neutral conductor only
D. Any phase conductor
✅ Answer: B. Bare copper conductor
3. Motor Protection
,A 3-phase motor draws 28 A full-load current. What is the minimum overload setting (typical
CEC rule)?
A. 25 A
B. 28 A
C. 30.8 A
D. 35 A
✅ Answer: C. 30.8 A (≈110% depending on motor type)
4. Ground Fault Protection
Where is GFCI protection generally required?
A. Industrial 600 V machinery rooms
B. Residential bathroom receptacles
C. Transformer secondary windings
D. HVAC disconnect switches
✅ Answer: B. Residential bathroom receptacles
5. Conduit Fill (Conceptual)
What is the maximum fill percentage for more than two conductors in a conduit?
A. 31%
B. 40%
C. 53%
D. 60%
✅ Answer: B. 40%
6. Transformer Calculation
A transformer steps down 600 V to 120 V. If primary current is 10 A, what is secondary current
(ideal conditions)?
A. 2 A
B. 20 A
, C. 50 A
D. 100 A
✅ Answer: B. 50 A
7. Fault Current Concept
The main purpose of interrupting rating in breakers is to:
A. Reduce power consumption
B. Limit voltage drop
C. Safely interrupt fault current
D. Increase conductor efficiency
✅ Answer: C. Safely interrupt fault current
8. Grounding vs Bonding
Bonding is primarily used to:
A. Stabilize system voltage
B. Prevent overcurrent
C. Ensure electrical continuity
D. Increase resistance
✅ Answer: C. Ensure electrical continuity
9. Load Calculation
A dwelling has:
• 8 kW heating
• 5 kW range
• 3 kW general load
What is total connected load?
A. 10 kW
B. 13 kW
CERTIFICATION PRACTICE
EXAM
150-Question Comprehensive Mock
Exam (CEC-Based) with Step-by-Step
Solutions
1. Voltage Drop Calculation
A 240 V circuit supplies a 10 kW load at 50 m. If conductor resistance causes a 3% voltage drop,
what is the approximate load voltage?
A. 240 V
B. 233 V
C. 227 V
D. 220 V
✅ Answer: B. 233 V
2. CEC Rule Application
According to the Canadian Electrical Code, which conductor is typically permitted as a bonding
conductor?
A. Aluminum conductor with insulation
B. Bare copper conductor
C. Neutral conductor only
D. Any phase conductor
✅ Answer: B. Bare copper conductor
3. Motor Protection
,A 3-phase motor draws 28 A full-load current. What is the minimum overload setting (typical
CEC rule)?
A. 25 A
B. 28 A
C. 30.8 A
D. 35 A
✅ Answer: C. 30.8 A (≈110% depending on motor type)
4. Ground Fault Protection
Where is GFCI protection generally required?
A. Industrial 600 V machinery rooms
B. Residential bathroom receptacles
C. Transformer secondary windings
D. HVAC disconnect switches
✅ Answer: B. Residential bathroom receptacles
5. Conduit Fill (Conceptual)
What is the maximum fill percentage for more than two conductors in a conduit?
A. 31%
B. 40%
C. 53%
D. 60%
✅ Answer: B. 40%
6. Transformer Calculation
A transformer steps down 600 V to 120 V. If primary current is 10 A, what is secondary current
(ideal conditions)?
A. 2 A
B. 20 A
, C. 50 A
D. 100 A
✅ Answer: B. 50 A
7. Fault Current Concept
The main purpose of interrupting rating in breakers is to:
A. Reduce power consumption
B. Limit voltage drop
C. Safely interrupt fault current
D. Increase conductor efficiency
✅ Answer: C. Safely interrupt fault current
8. Grounding vs Bonding
Bonding is primarily used to:
A. Stabilize system voltage
B. Prevent overcurrent
C. Ensure electrical continuity
D. Increase resistance
✅ Answer: C. Ensure electrical continuity
9. Load Calculation
A dwelling has:
• 8 kW heating
• 5 kW range
• 3 kW general load
What is total connected load?
A. 10 kW
B. 13 kW
