MASS Electrical Safety and Power Line Awareness

Question 1

According to OSHA 29 CFR 1926.1408, what is the minimum clearance distance required between a crane and overhead power lines rated up to 350kV during operations?

Accepted Answer

20 feet

Answer

10 feet

Answer

15 feet

Answer

25 feet

Question 2

If a crane becomes energized after contacting a power line and the operator CANNOT move the equipment free, what is the correct action?

Accepted Answer

Remain in the cab and warn all ground personnel to stay away

Answer

Jump out of the cab immediately

Answer

Use the crane's fire extinguisher on the contact point

Answer

Climb slowly down the crane to reach the ground

Question 3

Before beginning crane operations near overhead power lines, who is responsible for determining the voltage of those lines?

Accepted Answer

The employer or lift director

Answer

The crane operator on duty

Answer

The on-site safety officer

Answer

The local electrical inspector

Question 4

What is the primary purpose of an electrical proximity warning device (EPD) mounted on a crane?

Accepted Answer

To alert the operator when approaching the minimum clearance distance from energized power lines

Answer

To measure the crane's boom angle and load moment

Answer

To automatically shut down the crane engine when near power lines

Answer

To log electrical faults in the crane's wiring system

Question 5

What document or confirmation must be obtained from the utility company before a crane may operate inside the minimum approach distance to power lines?

Accepted Answer

Written confirmation that lines have been de-energized, grounded, or insulated

Answer

A line ownership certificate

Answer

A high-voltage work permit issued by the local authority

Answer

An electrical inspection report from a licensed electrician

Question 6

If a ground worker observes a crane boom contact an overhead power line, what is the FIRST action they should take?

Accepted Answer

Warn all personnel in the area to stay away from the crane

Answer

Grab the crane to stabilize it against the line

Answer

Attempt to pull the operator out of the cab

Answer

Dial 911 from a mobile phone while standing near the crane

Question 7

Which of the following correctly describes the 'restricted approach boundary' in the context of electrical safety near power lines?

Accepted Answer

The zone around energized conductors where unqualified workers must not enter without protection

Answer

The area where crane counterweights may swing freely

Answer

The maximum boom radius allowed on a job site

Answer

The perimeter marked by the lift director for rigging personnel