Nova Scotia Industrial 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 motor starter in an industrial
setting?
a) To increase voltage
b) To regulate current manually
c) To safely start and stop motors
d) To convert AC to DC
The motor starter provides overload protection and allows safe starting
and stopping of motors.
2. In three-phase systems, what is the phase angle between each
phase?
a) 45°
b) 60°
c) 120°
d) 90°
Three-phase systems are designed so that each phase is 120° apart for
balanced power distribution.
3. Which type of relay is commonly used for overcurrent protection?
a) Time-delay relay
b) Thermal overload relay
,c) Solid-state relay
d) Photoelectric relay
Thermal overload relays protect motors by tripping when excessive
current causes overheating.
4. What color is typically used to identify grounding conductors in
Canada?
a) Black
b) Red
c) Green or green with yellow stripes
d) White
Grounding conductors are green or green/yellow to prevent confusion
with live circuits.
5. What is the purpose of a variable frequency drive (VFD)?
a) To store electrical energy
b) To measure current
c) To control motor speed by varying frequency
d) To increase voltage efficiency
A VFD allows precise control of AC motor speed by adjusting the supply
frequency and voltage.
6. What is the primary hazard of working with capacitors in circuits?
a) Excessive heat
b) Low voltage
c) Stored electrical energy that can cause shock
d) Magnetic fields
Capacitors can retain charge even after power is disconnected, posing
shock risk.
, 7. Which device is used to measure insulation resistance?
a) Voltmeter
b) Ammeter
c) Megohmmeter
d) Oscilloscope
A megohmmeter applies high voltage to measure insulation resistance
in megohms.
8. What is the typical voltage drop allowed in a branch circuit?
a) 1%
b) 3%
c) 5%
d) 10%
Electrical codes generally recommend a maximum voltage drop of 3% in
branch circuits for efficiency and safety.
9. In a Delta connection, how many line and phase voltages are equal?
a) Line voltage = Phase voltage
b) Line voltage = 2 × Phase voltage
c) Line voltage ≠ Phase voltage
d) Line voltage = 0
In Delta connections, line voltage is not equal to phase voltage; they
follow the √3 relationship.
10. Which conductor material has the lowest resistivity?
a) Aluminum
b) Brass
c) Nickel
d) Copper
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a motor starter in an industrial
setting?
a) To increase voltage
b) To regulate current manually
c) To safely start and stop motors
d) To convert AC to DC
The motor starter provides overload protection and allows safe starting
and stopping of motors.
2. In three-phase systems, what is the phase angle between each
phase?
a) 45°
b) 60°
c) 120°
d) 90°
Three-phase systems are designed so that each phase is 120° apart for
balanced power distribution.
3. Which type of relay is commonly used for overcurrent protection?
a) Time-delay relay
b) Thermal overload relay
,c) Solid-state relay
d) Photoelectric relay
Thermal overload relays protect motors by tripping when excessive
current causes overheating.
4. What color is typically used to identify grounding conductors in
Canada?
a) Black
b) Red
c) Green or green with yellow stripes
d) White
Grounding conductors are green or green/yellow to prevent confusion
with live circuits.
5. What is the purpose of a variable frequency drive (VFD)?
a) To store electrical energy
b) To measure current
c) To control motor speed by varying frequency
d) To increase voltage efficiency
A VFD allows precise control of AC motor speed by adjusting the supply
frequency and voltage.
6. What is the primary hazard of working with capacitors in circuits?
a) Excessive heat
b) Low voltage
c) Stored electrical energy that can cause shock
d) Magnetic fields
Capacitors can retain charge even after power is disconnected, posing
shock risk.
, 7. Which device is used to measure insulation resistance?
a) Voltmeter
b) Ammeter
c) Megohmmeter
d) Oscilloscope
A megohmmeter applies high voltage to measure insulation resistance
in megohms.
8. What is the typical voltage drop allowed in a branch circuit?
a) 1%
b) 3%
c) 5%
d) 10%
Electrical codes generally recommend a maximum voltage drop of 3% in
branch circuits for efficiency and safety.
9. In a Delta connection, how many line and phase voltages are equal?
a) Line voltage = Phase voltage
b) Line voltage = 2 × Phase voltage
c) Line voltage ≠ Phase voltage
d) Line voltage = 0
In Delta connections, line voltage is not equal to phase voltage; they
follow the √3 relationship.
10. Which conductor material has the lowest resistivity?
a) Aluminum
b) Brass
c) Nickel
d) Copper
