Certificate Of Qualification Industrial
Electrician (442A) Practice Exam Questions
And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a lockout/tagout procedure?
A. Improve productivity
B. Prevent accidental equipment startup
C. Reduce maintenance time
D. Identify circuit voltage
Answer: B
Lockout/tagout ensures equipment cannot be energized while
work is being performed.
2. Which instrument is used to measure insulation resistance?
A. Multimeter
B. Clamp meter
C. Megohmmeter
D. Oscilloscope
Answer: C
A megohmmeter applies high voltage to test insulation integrity.
3. What color is typically used for grounding conductors?
A. White
B. Red
C. Black
D. Green
, Answer: D
Green identifies grounding and bonding conductors.
4. What does OHM’s law describe?
A. Magnetic force
B. Relationship between voltage, current, and resistance
C. Motor efficiency
D. Power factor
Answer: B
Ohm’s law defines how voltage, current, and resistance interact.
5. Which device protects against overloads and short circuits?
A. Contactor
B. Relay
C. Circuit breaker
D. Transformer
Answer: C
Circuit breakers interrupt current during fault conditions.
6. What is the function of a control transformer?
A. Increase motor speed
B. Isolate control voltage
C. Improve power factor
D. Reduce harmonics
Answer: B
Control transformers supply safe low-voltage power to control
circuits.
7. Which motor type has the highest starting torque?
A. Split-phase
B. Shaded pole
, C. Synchronous
D. Wound-rotor induction
Answer: D
Wound-rotor motors provide high starting torque.
8. What is the purpose of a thermal overload relay?
A. Detect ground faults
B. Control motor direction
C. Protect motor from overheating
D. Regulate voltage
Answer: C
Thermal overloads protect motors from excessive heat.
9. Which component stores electrical energy in an electric field?
A. Resistor
B. Inductor
C. Capacitor
D. Diode
Answer: C
Capacitors store energy in an electric field.
10. What does a normally closed (NC) contact do when
energized?
A. Remains closed
B. Opens
C. Short-circuits
D. Grounds the circuit
Answer: B
NC contacts open when energized.
Electrician (442A) Practice Exam Questions
And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a lockout/tagout procedure?
A. Improve productivity
B. Prevent accidental equipment startup
C. Reduce maintenance time
D. Identify circuit voltage
Answer: B
Lockout/tagout ensures equipment cannot be energized while
work is being performed.
2. Which instrument is used to measure insulation resistance?
A. Multimeter
B. Clamp meter
C. Megohmmeter
D. Oscilloscope
Answer: C
A megohmmeter applies high voltage to test insulation integrity.
3. What color is typically used for grounding conductors?
A. White
B. Red
C. Black
D. Green
, Answer: D
Green identifies grounding and bonding conductors.
4. What does OHM’s law describe?
A. Magnetic force
B. Relationship between voltage, current, and resistance
C. Motor efficiency
D. Power factor
Answer: B
Ohm’s law defines how voltage, current, and resistance interact.
5. Which device protects against overloads and short circuits?
A. Contactor
B. Relay
C. Circuit breaker
D. Transformer
Answer: C
Circuit breakers interrupt current during fault conditions.
6. What is the function of a control transformer?
A. Increase motor speed
B. Isolate control voltage
C. Improve power factor
D. Reduce harmonics
Answer: B
Control transformers supply safe low-voltage power to control
circuits.
7. Which motor type has the highest starting torque?
A. Split-phase
B. Shaded pole
, C. Synchronous
D. Wound-rotor induction
Answer: D
Wound-rotor motors provide high starting torque.
8. What is the purpose of a thermal overload relay?
A. Detect ground faults
B. Control motor direction
C. Protect motor from overheating
D. Regulate voltage
Answer: C
Thermal overloads protect motors from excessive heat.
9. Which component stores electrical energy in an electric field?
A. Resistor
B. Inductor
C. Capacitor
D. Diode
Answer: C
Capacitors store energy in an electric field.
10. What does a normally closed (NC) contact do when
energized?
A. Remains closed
B. Opens
C. Short-circuits
D. Grounds the circuit
Answer: B
NC contacts open when energized.
