NCCCO Service Truck Crane Operator Test 1 5

Question 1

What is the correct hand signal to tell the crane operator to 'boom down'?

Accepted Answer

Thumb pointing down with fist closed

Answer

The standard ASME/OSHA hand signal for 'boom down' (lower boom) is a closed fist with thumb pointing downward.

Question 2

When is an operator required to have a load line handler or rigger present?

Accepted Answer

Whenever the hook is not clearly visible to the operator throughout the lift

Answer

A signal person is required whenever the load or the path of travel is not clearly visible to the operator at all times during the lift.

Question 3

The minimum required clearance from an energized power line rated at 50 kV is:

Accepted Answer

10 feet

Answer

OSHA 1926.1408 requires a minimum 10-foot clearance from power lines up to 50 kV unless the line is de-energized and grounded or an insulating barrier is installed.

Question 4

What action should an operator take if the crane contacts an energized power line?

Accepted Answer

Remain in the cab and warn others not to touch the crane

Answer

If the crane contacts a live power line, the operator must stay in the cab to avoid ground potential differences, and warn others to stay clear.

Question 5

Which of the following is a disqualifying defect for a wire rope that requires immediate removal from service?

Accepted Answer

Six randomly distributed broken wires in one rope lay

Answer

ASME B30.22 disqualifies a wire rope when six or more randomly distributed broken wires are found in one rope lay, indicating significant structural degradation.

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO Service Truck Crane Operator Test 1 5