Examination Practice Questions And

Illinois Lineman Journeyman Certification Examination Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a Job Briefing before starting line work?
• Review employee attendance
• Improve team morale
• Identify hazards, procedures, and safety precautions
• Review company history

Rationale: Job briefings ensure all workers understand hazards, tools, and

procedures before beginning energized or de-energized work.

• Which device provides overcurrent protection on distribution lines?
• Insulator
• Guy wire
• Fuse cutout 1 / 4

• Spacer

Rationale: Fuse cutouts automatically open when current exceeds safe

limits, protecting equipment and conductors.

• What is the minimum approach distance (MAD) based on?
• Employee height
• Voltage levels and work method
• Crew size
• Weather

Rationale: MAD is determined by voltage exposure and whether work is

energized or de-energized.

4. The purpose of a ground rod in distribution systems is to:

• Cool transformers
• Dissipate fault current safely into the earth
• Increase power output
• Support poles

Rationale: Ground rods ensure fault current is directed into the earth

instead of through equipment or workers.

5. Guy wires are primarily used to:

• Conduct power
• Maintain pole stability
• Increase line voltage
• Add insulation 2 / 4

Rationale: Guy wires counterbalance tension forces and prevent pole lean

or failure.

• Which knot is most commonly used to tie in a handline?
• Clove hitch
• Square knot
• Bowline
• Half hitch

Rationale: The bowline creates a secure, non-slipping loop ideal for

hoisting tools.

• What is the typical voltage level for primary distribution lines?

A. 120/240 V

B. 600 V

• 4 kV–34.5 kV
• 69 kV–230 kV

Rationale: Primary distribution generally ranges between 4 kV and 34.5

kV.

• When is rubber glove work required?
• Only in bad weather
• When working energized lines within MAD
• When replacing poles
• Only for apprentices 3 / 4

Rationale: Rubber glove work protects workers when handling energized

conductors at close distances.

9. A bucket truck must be grounded when:

• The weather is sunny
• Working near any metal
• Working on or near energized equipment
• Working in residential areas

Rationale: Grounding reduces the risk of step and touch potentials during

energized operations.

• What does a recloser do?
• Stabilizes poles
• Measures line voltage
• Opens and recloses automatically after faults
• Insulates conductors

Rationale: Reclosers help maintain service continuity by automatically

responding to temporary faults.

11. The main purpose of insulating blankets is to:

• Keep workers warm
• Store tools
• Cover energized parts for protection
• Mark boundaries
• / 4