Nova Scotia Construction Electrician
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a ground fault circuit interrupter
(GFCI)?
A) To increase current flow
B) To protect against overvoltage
C) To prevent electric shock from ground faults
D) To reduce resistance in a circuit
GFCIs detect ground faults and quickly disconnect the circuit to prevent
electric shock.
2. Which conductor color is typically used for a neutral wire in
Canada?
A) Red
B) Green
C) White
D) Black
White insulation identifies the neutral conductor in Canadian electrical
systems.
3. What is the maximum allowable voltage drop for branch circuits in
a residential building?
A) 1%
B) 3%
,C) 5%
D) 10%
The Canadian Electrical Code recommends a maximum voltage drop of
5% to ensure efficiency and safety.
4. In conduit systems, what is the minimum bend radius for rigid metal
conduit (RMC)?
A) 6 times the conduit diameter
B) 8 times the conduit diameter
C) 10 times the conduit diameter
D) 12 times the conduit diameter
RMC requires a minimum bend radius of 10 times the conduit diameter
to prevent damage to conductors.
5. When performing splicing in residential wiring, which method is
acceptable?
A) Twisting and taping only
B) Using approved wire connectors
C) Soldering only
D) Overlapping wires without connectors
Approved wire connectors ensure a secure and code-compliant
connection.
6. What is the primary function of a circuit breaker?
A) To step down voltage
B) To protect circuits from overloads and short circuits
C) To regulate current flow
D) To increase current capacity
Circuit breakers automatically interrupt the flow of electricity when
excessive current is detected.
, 7. Which type of wiring is most commonly used for underground
residential service?
A) NM cable
B) EMT
C) USE (Underground Service Entrance) cable
D) BX cable
USE cable is designed for direct burial and provides proper insulation for
underground installation.
8. What is the primary hazard when working near energized overhead
power lines?
A) Excessive noise
B) Electric shock or electrocution
C) Burns from tools
D) Exposure to UV light
Direct contact or arcing from high-voltage lines can result in serious
injury or death.
9. What is the purpose of a bonding conductor?
A) To carry normal current
B) To increase voltage
C) To create a low-resistance path to ground
D) To reduce electromagnetic interference
Bonding ensures all metal parts are at the same potential to prevent
electric shock.
10. In a 120/240V single-phase system, what is the voltage between
the two hot conductors?
A) 120V
B) 180V
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a ground fault circuit interrupter
(GFCI)?
A) To increase current flow
B) To protect against overvoltage
C) To prevent electric shock from ground faults
D) To reduce resistance in a circuit
GFCIs detect ground faults and quickly disconnect the circuit to prevent
electric shock.
2. Which conductor color is typically used for a neutral wire in
Canada?
A) Red
B) Green
C) White
D) Black
White insulation identifies the neutral conductor in Canadian electrical
systems.
3. What is the maximum allowable voltage drop for branch circuits in
a residential building?
A) 1%
B) 3%
,C) 5%
D) 10%
The Canadian Electrical Code recommends a maximum voltage drop of
5% to ensure efficiency and safety.
4. In conduit systems, what is the minimum bend radius for rigid metal
conduit (RMC)?
A) 6 times the conduit diameter
B) 8 times the conduit diameter
C) 10 times the conduit diameter
D) 12 times the conduit diameter
RMC requires a minimum bend radius of 10 times the conduit diameter
to prevent damage to conductors.
5. When performing splicing in residential wiring, which method is
acceptable?
A) Twisting and taping only
B) Using approved wire connectors
C) Soldering only
D) Overlapping wires without connectors
Approved wire connectors ensure a secure and code-compliant
connection.
6. What is the primary function of a circuit breaker?
A) To step down voltage
B) To protect circuits from overloads and short circuits
C) To regulate current flow
D) To increase current capacity
Circuit breakers automatically interrupt the flow of electricity when
excessive current is detected.
, 7. Which type of wiring is most commonly used for underground
residential service?
A) NM cable
B) EMT
C) USE (Underground Service Entrance) cable
D) BX cable
USE cable is designed for direct burial and provides proper insulation for
underground installation.
8. What is the primary hazard when working near energized overhead
power lines?
A) Excessive noise
B) Electric shock or electrocution
C) Burns from tools
D) Exposure to UV light
Direct contact or arcing from high-voltage lines can result in serious
injury or death.
9. What is the purpose of a bonding conductor?
A) To carry normal current
B) To increase voltage
C) To create a low-resistance path to ground
D) To reduce electromagnetic interference
Bonding ensures all metal parts are at the same potential to prevent
electric shock.
10. In a 120/240V single-phase system, what is the voltage between
the two hot conductors?
A) 120V
B) 180V
