Certified Power Lineman Journeyman
Licensing Exam Practice Test Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
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1. What is the primary purpose of a fuse in a power system?
A. Increase voltage
B. Store electrical energy
C. Protect circuits from overcurrent
D. Regulate frequency
Rationale: A fuse interrupts excessive current to prevent damage to
equipment and wiring.
2. Which unit measures electrical current?
A. Volt
B. Ohm
C. Watt
D. Ampere
Rationale: Amperes measure the flow of electric charge.
3. What tool is used to measure voltage in a circuit?
A. Clamp meter
B. Ohmmeter
C. Voltmeter
, D. Tachometer
Rationale: A voltmeter measures electrical potential difference.
4. What is the function of a transformer?
A. Store energy
B. Convert AC to DC
C. Change voltage levels
D. Increase resistance
Rationale: Transformers step voltage up or down in AC systems.
5. What type of current flows in one direction only?
A. AC
B. DC
C. Polyphase
D. Alternating pulse
Rationale: Direct current flows in a single direction.
6. What is the standard frequency of power systems in North America?
A. 25 Hz
B. 40 Hz
C. 60 Hz
D. 100 Hz
Rationale: North American grids operate at 60 Hz.
7. What safety device is used to protect linemen from electrical shock?
A. Rubber boots
B. Hard hat
C. Insulated gloves
D. Safety glasses
Rationale: Insulated gloves reduce risk of electrical contact injury.
8. What does PPE stand for?
A. Power Protection Equipment
B. Primary Power Engine
C. Personal Protective Equipment
, D. Power Phase Equalizer
Rationale: PPE refers to safety gear worn to reduce hazards.
9. What is the main function of a circuit breaker?
A. Store power
B. Interrupt current during faults
C. Increase voltage
D. Convert AC to DC
Rationale: Circuit breakers stop current flow during overloads or faults.
10.What is resistance measured in?
A. Volts
B. Watts
C. Amperes
D. Ohms
Rationale: Ohms measure opposition to current flow.
11.Which material is a good electrical conductor?
A. Rubber
B. Plastic
C. Glass
D. Copper
Rationale: Copper has low resistance and conducts electricity well.
12.What is the purpose of grounding in electrical systems?
A. Increase voltage
B. Store electricity
C. Provide a safe path for fault current
D. Reduce frequency
Rationale: Grounding protects people and equipment from fault currents.
13.What device measures electrical resistance?
A. Voltmeter
B. Ammeter
C. Ohmmeter
Licensing Exam Practice Test Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
1. What is the primary purpose of a fuse in a power system?
A. Increase voltage
B. Store electrical energy
C. Protect circuits from overcurrent
D. Regulate frequency
Rationale: A fuse interrupts excessive current to prevent damage to
equipment and wiring.
2. Which unit measures electrical current?
A. Volt
B. Ohm
C. Watt
D. Ampere
Rationale: Amperes measure the flow of electric charge.
3. What tool is used to measure voltage in a circuit?
A. Clamp meter
B. Ohmmeter
C. Voltmeter
, D. Tachometer
Rationale: A voltmeter measures electrical potential difference.
4. What is the function of a transformer?
A. Store energy
B. Convert AC to DC
C. Change voltage levels
D. Increase resistance
Rationale: Transformers step voltage up or down in AC systems.
5. What type of current flows in one direction only?
A. AC
B. DC
C. Polyphase
D. Alternating pulse
Rationale: Direct current flows in a single direction.
6. What is the standard frequency of power systems in North America?
A. 25 Hz
B. 40 Hz
C. 60 Hz
D. 100 Hz
Rationale: North American grids operate at 60 Hz.
7. What safety device is used to protect linemen from electrical shock?
A. Rubber boots
B. Hard hat
C. Insulated gloves
D. Safety glasses
Rationale: Insulated gloves reduce risk of electrical contact injury.
8. What does PPE stand for?
A. Power Protection Equipment
B. Primary Power Engine
C. Personal Protective Equipment
, D. Power Phase Equalizer
Rationale: PPE refers to safety gear worn to reduce hazards.
9. What is the main function of a circuit breaker?
A. Store power
B. Interrupt current during faults
C. Increase voltage
D. Convert AC to DC
Rationale: Circuit breakers stop current flow during overloads or faults.
10.What is resistance measured in?
A. Volts
B. Watts
C. Amperes
D. Ohms
Rationale: Ohms measure opposition to current flow.
11.Which material is a good electrical conductor?
A. Rubber
B. Plastic
C. Glass
D. Copper
Rationale: Copper has low resistance and conducts electricity well.
12.What is the purpose of grounding in electrical systems?
A. Increase voltage
B. Store electricity
C. Provide a safe path for fault current
D. Reduce frequency
Rationale: Grounding protects people and equipment from fault currents.
13.What device measures electrical resistance?
A. Voltmeter
B. Ammeter
C. Ohmmeter
