Texas Electric Utility Lineworker Licensing Exam –
Practice Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
download Pdf
1. What is the primary function of a distribution transformer?
A. Convert AC to DC
B. Step down voltage for customer use
C. Increase frequency
D. Store electrical energy
Rationale: Transformers reduce high distribution voltages to usable levels for
residential or commercial use.
2. What is the typical voltage range of primary distribution lines in Texas?
A. 110–240 V
B. 1–5 kV
C. 4–35 kV
D. 50–100 kV
Rationale: Distribution systems generally operate between 4 kV and 35 kV
depending on system design.
3. What device is used to interrupt fault currents in overhead distribution lines?
A. Fuse cutout
B. Lightning arrester
C. Recloser
D. Capacitor bank
Rationale: Reclosers automatically open and close to isolate faults and maintain
service continuity.
,4. What is the minimum safe approach distance for a lineworker near a 15 kV line?
A. 1 foot
B. 2 feet
C. 3 feet 2 inches
D. 5 feet
Rationale: OSHA and NESC standards specify minimum approach distances for
different voltage levels.
5. Which component connects the neutral of a transformer to the system ground?
A. Line tap
B. Ground wire
C. Bushing
D. Guy wire
Rationale: Ground wires provide a low-resistance path for fault currents and
stabilize system voltage.
6. What is the purpose of a guy wire on a pole?
A. Carry electrical current
B. Support conductors
C. Provide mechanical stability
D. Reduce voltage drop
Rationale: Guy wires balance the mechanical forces acting on poles due to
conductor tension.
7. What does PPE stand for in electrical work?
A. Power Phase Equipment
B. Personal Protection Essentials
C. Personal Protective Equipment
D. Primary Protection Elements
, Rationale: PPE includes safety gear such as gloves, helmets, and arc-rated clothing
to prevent injury.
8. What tool is used to test for voltage presence before working on a line?
A. Multimeter
B. Ohmmeter
C. Voltage detector
D. Clamp meter
Rationale: Voltage detectors provide a quick and safe way to confirm de-
energization before contact.
9. Which material is most commonly used for overhead conductors?
A. Copper
B. Iron
C. Aluminum
D. Zinc
Rationale: Aluminum is lightweight, corrosion-resistant, and cost-effective for
power lines.
10. What is the function of an insulator?
A. Carry electric current
B. Convert voltage
C. Prevent current leakage
D. Protect against lightning
Rationale: Insulators prevent current flow from conductors to supporting
structures.
11. What is the purpose of a bucket truck in linework?
A. Transport poles
Practice Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
download Pdf
1. What is the primary function of a distribution transformer?
A. Convert AC to DC
B. Step down voltage for customer use
C. Increase frequency
D. Store electrical energy
Rationale: Transformers reduce high distribution voltages to usable levels for
residential or commercial use.
2. What is the typical voltage range of primary distribution lines in Texas?
A. 110–240 V
B. 1–5 kV
C. 4–35 kV
D. 50–100 kV
Rationale: Distribution systems generally operate between 4 kV and 35 kV
depending on system design.
3. What device is used to interrupt fault currents in overhead distribution lines?
A. Fuse cutout
B. Lightning arrester
C. Recloser
D. Capacitor bank
Rationale: Reclosers automatically open and close to isolate faults and maintain
service continuity.
,4. What is the minimum safe approach distance for a lineworker near a 15 kV line?
A. 1 foot
B. 2 feet
C. 3 feet 2 inches
D. 5 feet
Rationale: OSHA and NESC standards specify minimum approach distances for
different voltage levels.
5. Which component connects the neutral of a transformer to the system ground?
A. Line tap
B. Ground wire
C. Bushing
D. Guy wire
Rationale: Ground wires provide a low-resistance path for fault currents and
stabilize system voltage.
6. What is the purpose of a guy wire on a pole?
A. Carry electrical current
B. Support conductors
C. Provide mechanical stability
D. Reduce voltage drop
Rationale: Guy wires balance the mechanical forces acting on poles due to
conductor tension.
7. What does PPE stand for in electrical work?
A. Power Phase Equipment
B. Personal Protection Essentials
C. Personal Protective Equipment
D. Primary Protection Elements
, Rationale: PPE includes safety gear such as gloves, helmets, and arc-rated clothing
to prevent injury.
8. What tool is used to test for voltage presence before working on a line?
A. Multimeter
B. Ohmmeter
C. Voltage detector
D. Clamp meter
Rationale: Voltage detectors provide a quick and safe way to confirm de-
energization before contact.
9. Which material is most commonly used for overhead conductors?
A. Copper
B. Iron
C. Aluminum
D. Zinc
Rationale: Aluminum is lightweight, corrosion-resistant, and cost-effective for
power lines.
10. What is the function of an insulator?
A. Carry electric current
B. Convert voltage
C. Prevent current leakage
D. Protect against lightning
Rationale: Insulators prevent current flow from conductors to supporting
structures.
11. What is the purpose of a bucket truck in linework?
A. Transport poles
