NCCCO Hazard Identification and Power Line Safety

Question 1

Under OSHA 1926.1408, what is the minimum required clearance when operating a crane near an energized power line rated at 50 kV or less?

Accepted Answer

10 feet

Answer

6 feet

Answer

15 feet

Answer

20 feet

Question 2

Before any crane operation near power lines, the employer must attempt to determine the voltage of the lines. If the voltage cannot be determined, what clearance applies?

Accepted Answer

10 feet minimum until the utility confirms the voltage

Answer

The maximum clearance in Table A (45 feet for 750 kV)

Answer

Zero clearance if insulated boom covers are installed

Answer

5 feet if a spotter is present

Question 3

Which hazard recognition step is required when a crane must work within the Table A distances of a power line?

Accepted Answer

Contact the utility owner and obtain written confirmation of voltage and whether de-energizing is feasible

Answer

Install a warning flag on the boom tip and proceed

Answer

Post a sign at the site entrance noting the power line

Answer

Reduce swing speed to less than 2 RPM

Question 4

If a crane boom accidentally contacts a power line and the crane becomes energized, what should bystanders on the ground do?

Accepted Answer

Stay away and not touch the crane or any grounded object near it

Answer

Immediately grab the outrigger pads to stabilize the crane

Answer

Run toward the crane to help the operator exit

Answer

Pour water on the contact point to quench the arc

Question 5

Under OSHA 1926 Subpart CC, which person is responsible for identifying power line hazards before crane setup begins?

Accepted Answer

The employer or competent person conducting the hazard assessment

Answer

The signal person assigned to the lift

Answer

The utility company's field representative only

Answer

The crane manufacturer's field service technician

Question 6

A spotter (dedicated observer) is used during operations near power lines. Which of the following is a correct requirement for the spotter?

Accepted Answer

The spotter must be positioned to clearly see the crane and power line and be in direct communication with the operator at all times

Answer

The spotter may also serve as the signal person for the lift simultaneously

Answer

The spotter must stand between the crane and the power line

Answer

The spotter's role is optional if the operator has a line-of-sight view