NCCCO Rigging Fundamentals and Hardware 5

Question 1

Which type of hook is specifically designed to prevent accidental release of a sling or load during a lift?

Accepted Answer

Safety latch hook

Answer

Safety latch hooks incorporate a spring-loaded latch that must be manually depressed to open, preventing accidental sling or load release.

Question 2

When rigging a load with multiple lift points, the load should be picked up using a test lift by raising the load:

Accepted Answer

A few inches off the ground to check balance and sling tension before proceeding

Answer

A trial lift a few inches off the ground lets the rigger verify load balance, sling tension, and stability before committing to the full lift.

Question 3

The minimum number of full tucks required for a proper mechanical splice in wire rope is:

Accepted Answer

5

Answer

ASME B30.9 requires a minimum of 5 full tucks for a proper mechanical splice in wire rope to achieve full rated capacity.

Question 4

A turnbuckle used in a rigging assembly should always be:

Accepted Answer

Loaded in line (tension) along its axis only

Answer

Turnbuckles are rated for axial tension loads only; side-loading or bending a turnbuckle can cause premature failure well below its rated capacity.

Question 5

What is the purpose of a tag line during a crane lift?

Accepted Answer

To control load spin and prevent uncontrolled rotation

Answer

Tag lines are used by ground personnel to control load rotation and lateral movement during a lift, keeping the load positioned safely.

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