MASS Electrical Safety and Power Line Awareness 2

Question 1

What is the minimum clearance distance required from power lines when the voltage is UNKNOWN?

Accepted Answer

50 feet

Answer

10 feet

Answer

20 feet

Answer

100 feet

Question 2

Which OSHA standard specifically governs power line safety requirements for crane and derrick operations in construction?

Accepted Answer

29 CFR 1926.1408

Answer

29 CFR 1910.269

Answer

29 CFR 1926.502

Answer

29 CFR 1926.600

Question 3

What is 'step potential' and why does it pose a hazard near an energized crane?

Accepted Answer

A voltage difference between two ground contact points that drives current through a person's legs and body

Answer

The mechanical force needed to climb crane steps; it increases risk of falls

Answer

The electrical resistance of the crane's tracks that prevents proper grounding

Answer

The voltage required to start the crane engine, which varies with temperature

Question 4

According to OSHA, if a power line cannot be de-energized before crane operations, what must the utility company provide?

Accepted Answer

Insulation of the lines or a written revised minimum approach distance based on actual voltage

Answer

A certified electrician to monitor operations

Answer

A written waiver releasing the employer from OSHA requirements

Answer

An insurance bond covering electrical incidents during the project

Question 5

When operating a crane near power lines, OSHA requires that a specific person be assigned to what dedicated role?

Accepted Answer

A signal person assigned exclusively to monitor and maintain clearance from the power lines

Answer

A qualified electrical lineman to monitor line voltage

Answer

A certified rigger to handle all load connections near the lines

Answer

A utility company representative to authorize each lift

Question 6

How does high humidity affect the electrical hazard level during crane operations near overhead power lines?

Accepted Answer

High humidity increases danger because moisture improves electrical conductivity in the surrounding environment

Answer

Low humidity is more dangerous because dry conditions increase static electricity

Answer

Humidity has no measurable effect on power line hazard levels

Answer

Only visible rain, not humidity, affects the risk of electrical incidents

Question 7

OSHA requires the employer to notify the utility company and establish safe minimum approach distances before beginning crane operations within what distance of overhead power lines?

Accepted Answer

300 feet

Answer

50 feet

Answer

100 feet

Answer

500 feet