Master Lineman License Exam Practice

Master Lineman License Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a lineworker grounding system?
• Reduce line tension
• Protect personnel from electric shock
• Increase line voltage
• Improve communication signals

Rationale: Grounding provides a low-resistance path to divert fault current

away from personnel, minimizing the risk of electric shock.

• Which type of conductor is most commonly used for high-voltage

transmission lines?

• Aluminum
• Copper 1 / 4

• Aluminum Conductor Steel-Reinforced (ACSR)
• Silver

Rationale: ACSR combines lightweight aluminum for conductivity with

steel for strength, making it ideal for high-voltage lines.

3. The primary hazard when working near energized lines is:

• Falling from a pole
• Equipment malfunction
• Electrical shock or electrocution
• Lightning

Rationale: Contact with energized conductors is the main risk, as it can

cause severe injury or death.

• What is the minimum approach distance for 12 kV lines?
• 1 foot
• 3 feet
• 3 feet 6 inches
• 6 feet

Rationale: OSHA and utility safety standards specify minimum approach

distances to prevent accidental contact with energized lines.

• Which tool is considered insulated for lineworker use?
• Steel hammer
• Hot stick 2 / 4

• Wrench
• Crowbar

Rationale: A hot stick is designed to allow safe handling of live lines by

insulating the worker from high voltage.

6. When climbing a pole, the first safety measure is to:

• Grab the crossarm
• Wear proper PPE and climbing gear
• Use a ladder
• Inspect tools only

Rationale: Proper personal protective equipment (PPE) and climbing gear

reduce the risk of falls and injury.

• Which type of line is considered primary?
• Secondary distribution
• Service drop
• Transmission or feeder line
• Streetlight circuit

Rationale: Primary lines carry high voltage from substations to distribution

transformers.

8. A lineman must test a pole before climbing. The purpose is to:

• Measure pole height
• Identify utilities 3 / 4

• Check structural integrity
• Install crossarms

Rationale: Poles may be weakened by rot, insects, or damage; testing

ensures they can safely support a lineman.

• Which personal protective equipment is mandatory when working on

energized high-voltage lines?

• Gloves only
• Gloves, hard hat, sleeves, and face shield
• Safety boots only
• Safety glasses only

Rationale: Full PPE protects against electrical burns, shock, and arc flash

incidents.

• When a conductor snaps under tension, the most immediate

danger is:

• Tool damage
• Fire
• Whipback or flying conductor
• Oil spill

Rationale: A snapping conductor can strike nearby personnel or objects,

causing injury or death.

• What is the primary reason for using a guy wire?
• Conduct electricity
• / 4