NCCCO Sling Types and Load Distribution 4

Question 1

A nylon web sling should NOT be used when in contact with:

Accepted Answer

Acids or bleaching agents

Answer

Nylon is degraded by acids and bleaching agents; exposure can drastically reduce its strength and lead to sling failure.

Question 2

When lifting a load with a four-leg bridle sling, how many legs are assumed to share the load equally per ASME B30.9 guidance?

Accepted Answer

Three legs, with the fourth as backup

Answer

ASME B30.9 states that for a four-leg bridle, only three legs are assumed to carry the load because one leg may go slack due to load geometry variations.

Question 3

Which condition requires immediate removal of a chain sling from service?

Accepted Answer

Chain elongation exceeding 3% of the original length

Answer

Chain elongation of 3% or more indicates overload or fatigue and is a rejection criterion under ASME B30.9.

Question 4

What does 'rated capacity' of a sling mean?

Accepted Answer

The maximum working load limit for a specific hitch and angle

Answer

Rated capacity (Working Load Limit) is the maximum load a sling may carry for a specific hitch configuration and sling angle, as specified by the manufacturer.

Question 5

When selecting a sling for a load with sharp edges, which protective measure is required?

Accepted Answer

Using padding or corner protectors between the sling and load edge

Answer

Sharp edges can cut or abrade slings, so padding or corner protectors must be used to protect the sling and maintain its rated capacity.

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

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

NCCCO Sling Types and Load Distribution 4