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Ohio Utility Line Worker Class B Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf
- What is the primary purpose of a utility line worker?
- To install plumbing systems
- To construct, maintain, and repair electrical power lines
- To repair vehicles
- To read electric meters
Rationale: Utility line workers build and maintain power delivery systems
that transmit electricity from substations to customers.
- What is the standard voltage for primary distribution lines?
- 120 volts
- 240 volts
- 7,200 volts 1 / 4
- 480 volts
Rationale: Most primary distribution lines in Ohio operate around 7,200
volts phase-to-ground.
- Which safety rule applies when working near energized conductors?
- Keep tools 1 foot away
- Only wear rubber gloves
- Maintain the minimum approach distance
- De-energize the line automatically
Rationale: OSHA and utility standards require minimum approach
distances depending on voltage.
- What is the function of a transformer?
- To measure current
- To change voltage levels
- To ground circuits
- To store power
Rationale: Transformers step voltage up or down for efficient transmission
or safe distribution.
- What is the proper way to test a line before working on it?
- Assume it’s dead 2 / 4
- Ask a coworker
- Use an approved voltage tester
- Ground it first
Rationale: Always test with a voltage detector before handling any
conductor.
- What does PPE stand for?
- Power Pole Equipment
- Personal Power Equipment
- Personal Protective Equipment
- Primary Protective Equipment
Rationale: PPE includes gloves, helmets, boots, and clothing designed to
protect workers.
- What is the purpose of grounding?
- To increase line voltage
- To protect workers by directing fault current to earth
- To store electrical energy
- To balance circuits
Rationale: Grounding ensures any fault current flows safely to earth,
minimizing shock risk.
- / 4
- When should rubber gloves be inspected?
- Once a week
- Before each use
- Once a month
- Only after repairs
Rationale: Rubber gloves must be inspected for holes, cracks, or damage
before every use.
- Which of the following is NOT a component of a pole-line construction?
- Crossarm
- Insulator
- Engine block
- Guy wire
Rationale: Engine blocks are unrelated to utility pole construction.
- What is the main purpose of a crossarm?
- To attach transformers
- To increase pole strength
- To support conductors
- To carry communications cables
Rationale: Crossarms hold and space conductors securely on utility poles.
- / 4
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