RSP Rigging Procedures & Equipment 3

Question 1

A synthetic web sling is color-coded yellow. What material is it made from?

Accepted Answer

Polypropylene

Answer

Per ASME B30.9, polypropylene synthetic web slings are color-coded yellow, while nylon is white and polyester is blue.

Question 2

When rigging an asymmetrical load, the lift point should be located:

Accepted Answer

Directly above the center of gravity

Answer

The hook must be positioned directly above the load's center of gravity to prevent the load from tipping or shifting during the lift.

Question 3

What is the purpose of a spreader bar (spreader beam) in a rigging assembly?

Accepted Answer

To reduce sling tension by eliminating horizontal compression on the load

Answer

A spreader bar keeps sling legs vertical or at a wider angle, reducing inward horizontal forces on the load and decreasing sling leg tension.

Question 4

According to OSHA 1926.251, a hook with a crack in its saddle must be:

Accepted Answer

Removed from service and destroyed

Answer

Hooks with cracks, deformations, or twist exceeding 10 degrees must be removed from service and not returned to use.

Question 5

The 'D/d ratio' in rigging refers to:

Accepted Answer

The ratio of the sheave diameter to the rope diameter

Answer

The D/d ratio compares the diameter of the sheave (D) to the diameter of the rope (d); a larger ratio reduces bending stress and extends rope life.

(RSP) Rigger and Signal Person Certification Practice Test