Lineman Safety Regulations and Compliance 4

Question 1

According to the NESC, what is the required minimum vertical clearance for a 7,200-volt distribution line over a public road?

Accepted Answer

18 feet

Answer

12 feet

Answer

15 feet

Answer

22 feet

Question 2

What condition must exist before a lineman may use barehand (live-line) work methods on a high-voltage transmission line?

Accepted Answer

The worker must be at the same electrical potential as the conductor and bonded to it

Answer

The line must be de-energized and tested with a voltmeter

Answer

The worker must be insulated from ground by a fiberglass bucket

Answer

The line voltage must be below 69 kV

Question 3

Under OSHA 1910.269, which of the following is a specific requirement before a crew begins work on a de-energized overhead line?

Accepted Answer

Visually inspect the line for any back-feed sources and verify de-energization with a live-line tester

Answer

Obtain a written permit from the local utility commission

Answer

Wait 30 minutes after switching to allow capacitive charge to dissipate

Answer

Post a lookout at each end of the de-energized section

Question 4

A lineman receives an electrical contact injury but is still conscious. What should be the FIRST action by the crew?

Accepted Answer

Remove the victim from the hazard without touching them directly if the circuit is still energized, or shut off power first

Answer

Begin CPR immediately before doing anything else

Answer

Call 911 and wait for paramedics before moving the victim

Answer

Apply pressure bandages to any visible burns

Question 5

What is the purpose of the two-person rule required by OSHA for certain high-voltage tasks?

Accepted Answer

To ensure a second qualified worker is present who can de-energize the circuit and provide first aid if the primary worker is incapacitated

Answer

To satisfy union contract requirements for crew size

Answer

To allow one worker to hold tools while the other works

Answer

To maintain radio contact with the dispatcher at all times

Question 6

Which type of fire extinguisher is appropriate for use on energized electrical equipment?

Accepted Answer

Class C (CO2 or dry chemical non-conductive agent)

Answer

Class A (water-based)

Answer

Class B (foam)

Answer

Class D (dry powder for metals)

Question 7

When excavating near underground utilities, what is the federally mandated first step before any digging begins?

Accepted Answer

Contact 811 (Call Before You Dig) to request utility locates

Answer

Obtain a soil classification from a geotechnical engineer

Answer

Erect spoil piles at least 4 feet from the excavation edge

Answer

Install a competent-person inspection log at the site