NCCCO Service Truck Crane Operator Test 1 3

Question 1

When reading a service truck crane load chart, what does the 'working radius' refer to?

Accepted Answer

The horizontal distance from the crane's rotation axis to the center of the load

Answer

Working radius is the horizontal distance from the axis of crane rotation to the center of the suspended load.

Question 2

Which condition requires an operator to immediately stop crane operations?

Accepted Answer

A nearby worker enters the swing radius

Answer

Operations must stop immediately when any person enters the crane's swing radius to prevent crush injuries.

Question 3

What is the purpose of a anti-two-block device on a service truck crane?

Accepted Answer

To prevent the load block from being raised into the boom tip

Answer

An anti-two-block device automatically stops hoist travel to prevent the load block from colliding with the boom tip sheaves.

Question 4

When setting outrigger pads on soft or unstable ground, the operator should:

Accepted Answer

Use cribbing or mats to distribute the load over a larger area

Answer

Cribbing or crane mats spread the outrigger load over a larger area to prevent sinking or tipping on soft ground.

Question 5

According to ASME B30.22, what is the minimum number of wraps of wire rope that must remain on the hoist drum during operation?

Accepted Answer

2 wraps

Answer

ASME B30.22 requires at least two wraps of wire rope on the hoist drum at maximum extension to maintain rope retention.

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