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Sling Types and Load Distribution Flashcards

7 cards from real NCCCO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the primary reason sling angles below 30 degrees from horizontal are generally prohibited?

    Answer: Tension in sling legs exceeds two times the load weight, drastically increasing failure risk

    At angles below 30 degrees from horizontal, the tension multiplier exceeds 2.0, meaning each sling leg must support more than the total load weight, risking sling failure.

  2. A polyester web sling offers an advantage over nylon in which specific environment?

    Answer: Acidic environments

    Polyester is more resistant to acids than nylon, making it preferable in mild acidic environments, though both types have chemical exposure limitations.

  3. When a load's center of gravity is higher than the attachment points of a multi-leg bridle sling, the result is:

    Answer: An unstable lift that could cause the load to tip over

    If the COG is above the attachment points, the load is top-heavy and will be unstable, risking a tip-over once lifted free of the ground.

  4. Which type of sling provides the best resistance to abrasion during dragging operations?

    Answer: Wire rope slings

    Wire rope slings have superior abrasion resistance compared to synthetic slings, making them more suitable where contact with rough surfaces is expected.

  5. An alloy chain sling must be proof-tested to what load before being placed into service?

    Answer: 1.5 times the rated working load limit

    New alloy chain slings are proof-tested to 1.5 times their rated working load limit prior to being placed into service, per ASME B30.9 requirements.

  6. When calculating the load per sling leg in a two-leg bridle, if the total load is 8,000 lbs and the sling angle is 45 degrees from horizontal, what is the approximate tension per leg?

    Answer: 5,660 lbs

    At 45 degrees, the tension factor is approximately 1.414; each leg carries (8,000 / 2) × 1.414 ≈ 5,656 lbs, rounded to 5,660 lbs.

  7. What action should be taken if a synthetic sling's identification tag is missing or illegible?

    Answer: Remove the sling from service until properly identified and tagged

    Without legible identification, the rated capacity cannot be verified, so the sling must be removed from service per ASME B30.9.