Journeyman Lineman Exam
Questions And Correct
Answers (Verified Answers)
Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What is the primary purpose of a transformer?
A. Store electrical energy
B. Step voltage up or down
C. Convert AC to DC
D. Measure current
Rationale: Transformers change voltage levels through
electromagnetic induction without changing frequency.
2. Which tool is used to measure voltage?
A. Clamp meter
B. Ohmmeter
C. Voltmeter
D. Megger
Rationale: A voltmeter is designed specifically to measure electrical
potential difference.
3. What is the standard frequency of power systems in North
America?
,A. 50 Hz
B. 25 Hz
C. 60 Hz
D. 100 Hz
Rationale: North American utility systems operate at 60 cycles per
second.
4. What does PPE stand for?
A. Power Protection Equipment
B. Personal Power Equipment
C. Personal Protective Equipment
D. Primary Power Engineering
Rationale: PPE refers to safety gear used to protect workers from
hazards.
5. What is the function of a circuit breaker?
A. Increase voltage
B. Store energy
C. Interrupt fault current
D. Regulate frequency
Rationale: Circuit breakers automatically open circuits during faults.
6. What is Ohm’s Law?
A. P = VI
B. V = IR
C. V = IR
D. I = PR
Rationale: Ohm’s Law defines the relationship between voltage,
current, and resistance.
, 7. What is the main hazard when working on energized lines?
A. Noise
B. Heat
C. Electrical shock
D. Vibration
Rationale: Contact with energized conductors can cause severe injury
or death.
8. What device protects against lightning surges on lines?
A. Capacitor bank
B. Transformer
C. Fuse
D. Lightning arrester
Rationale: Arresters divert surge energy safely to ground.
9. What is the purpose of a ground wire?
A. Carry load current
B. Increase voltage
C. Provide fault path to earth
D. Reduce resistance
Rationale: Grounding ensures safe dissipation of fault current.
10. What does AC stand for?
A. Applied Current
B. Adjustable Current
C. Alternating Current
D. Active Circuit
Rationale: AC periodically reverses direction.
Questions And Correct
Answers (Verified Answers)
Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What is the primary purpose of a transformer?
A. Store electrical energy
B. Step voltage up or down
C. Convert AC to DC
D. Measure current
Rationale: Transformers change voltage levels through
electromagnetic induction without changing frequency.
2. Which tool is used to measure voltage?
A. Clamp meter
B. Ohmmeter
C. Voltmeter
D. Megger
Rationale: A voltmeter is designed specifically to measure electrical
potential difference.
3. What is the standard frequency of power systems in North
America?
,A. 50 Hz
B. 25 Hz
C. 60 Hz
D. 100 Hz
Rationale: North American utility systems operate at 60 cycles per
second.
4. What does PPE stand for?
A. Power Protection Equipment
B. Personal Power Equipment
C. Personal Protective Equipment
D. Primary Power Engineering
Rationale: PPE refers to safety gear used to protect workers from
hazards.
5. What is the function of a circuit breaker?
A. Increase voltage
B. Store energy
C. Interrupt fault current
D. Regulate frequency
Rationale: Circuit breakers automatically open circuits during faults.
6. What is Ohm’s Law?
A. P = VI
B. V = IR
C. V = IR
D. I = PR
Rationale: Ohm’s Law defines the relationship between voltage,
current, and resistance.
, 7. What is the main hazard when working on energized lines?
A. Noise
B. Heat
C. Electrical shock
D. Vibration
Rationale: Contact with energized conductors can cause severe injury
or death.
8. What device protects against lightning surges on lines?
A. Capacitor bank
B. Transformer
C. Fuse
D. Lightning arrester
Rationale: Arresters divert surge energy safely to ground.
9. What is the purpose of a ground wire?
A. Carry load current
B. Increase voltage
C. Provide fault path to earth
D. Reduce resistance
Rationale: Grounding ensures safe dissipation of fault current.
10. What does AC stand for?
A. Applied Current
B. Adjustable Current
C. Alternating Current
D. Active Circuit
Rationale: AC periodically reverses direction.
