MASS Test Rigging and Slings Flashcards

What is the minimum number of legs required for a rigging configuration to be self-balancing when lifting a symmetrical load?

Answer: 2

Two legs allow a symmetrical load to hang in balance, provided the attachment points are equidistant from the load's center of gravity.

Which factor is most critical when selecting a sling for a high-temperature environment?

Answer: Sling material heat resistance rating

High temperatures degrade synthetic slings rapidly, so the sling material's heat resistance rating must exceed the ambient and load temperature.

What is the purpose of a softener or padding when using a wire rope sling on a sharp-edged load?

Answer: To prevent the sharp edge from cutting or damaging the sling

Softeners and padding protect wire rope and synthetic slings from sharp edges that can nick, cut, or crush the sling and reduce its rated capacity.

According to ASME B30.9, how often must rigging slings receive a formal documented inspection?

Answer: At least annually or more frequently when conditions warrant

ASME B30.9 requires periodic documented inspections at least annually, with more frequent inspections based on use severity and environmental conditions.

What does a red color code on a rigging sling typically indicate?

Answer: The sling's capacity is 3/8 inch or a specific load rating per the manufacturer's color system

Color coding on slings typically corresponds to the sling size or capacity per the manufacturer's or industry color identification system, with red commonly indicating a specific size rating.

When is it acceptable to shorten a wire rope sling by knotting it?

Answer: Never — knotting is never acceptable for wire rope slings

Knotting a wire rope sling is never acceptable because it creates severe stress concentrations that drastically reduce the sling's load-bearing capacity.