MASS MASS Test Rigging and Slings 2

Question 1

What effect does a narrow sling angle (less than 30°) have on the tension in each leg of a multi-leg sling?

Accepted Answer

It greatly increases tension in each leg

Answer

Narrow sling angles dramatically increase the tension in each leg, potentially exceeding the sling's rated capacity even for a moderate load.

Question 2

Which type of hitch provides the least security because the load can tip or slide?

Accepted Answer

Vertical hitch

Answer

A vertical hitch is the least secure because the load is only supported from above and can tip, rotate, or slide off the hook.

Question 3

What should a rigger check on a shackle before use?

Accepted Answer

The pin is fully seated, moused, and the WLL is legible

Answer

Riggers must verify the shackle pin is fully threaded and secured (moused), and confirm the Working Load Limit marking is readable.

Question 4

When using a choker hitch, how does the load capacity compare to the sling's vertical rated capacity?

Accepted Answer

It is approximately 75-80% of the vertical capacity

Answer

A choker hitch reduces the sling's effective capacity to approximately 75-80% of its vertical rating due to the angle stress at the choke point.

Question 5

What is the purpose of a tag line during a rigging operation?

Accepted Answer

To control load swing and rotation without direct contact

Answer

Tag lines allow workers to guide and control a suspended load's rotation and movement without standing under or in direct contact with the load.

MASS Test Practice Test