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ASME Cranes Hoists and Material Handling B30 Flashcards

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  1. According to ASME B30.9, what is the minimum design factor (safety factor) required for wire rope slings?

    Answer: 5:1

    ASME B30.9 requires wire rope slings to have a minimum design factor of 5:1, meaning the sling's breaking strength must be at least five times its rated capacity.

  2. Per ASME B30.10, at what percentage of throat opening increase must a hook be removed from service?

    Answer: 15%

    ASME B30.10 specifies that a hook must be removed from service if the throat opening has increased by more than 15% from the original dimension, indicating dangerous deformation.

  3. According to ASME B30.20, what information must be permanently marked on below-the-hook lifting devices?

    Answer: Manufacturer name, rated load capacity, and weight of the device

    ASME B30.20 requires that below-the-hook lifting devices bear permanent markings identifying the manufacturer, the rated load, and the weight of the device itself.

  4. Per ASME B30.2, what must be done before personnel are permitted to work beneath a suspended load?

    Answer: Ensure the load is secured and cannot be accidentally released or dropped

    ASME B30.2 prohibits personnel from working beneath a suspended load unless the load is safely secured, such as blocked or cribbed, to prevent unintended movement or dropping.

  5. According to ASME B30.5 for mobile cranes, which condition triggers mandatory inspection of the load line?

    Answer: After any occurrence that could have caused damage, such as a shock load

    ASME B30.5 requires inspection of the load line following any event that may have caused damage, including shock loads, contact with obstructions, or a dropped load.

  6. Per ASME B30.9, which sling configuration results in the greatest reduction in rated capacity compared to a straight vertical lift?

    Answer: Two-leg bridle sling at 120 degrees included angle

    As the included angle between sling legs increases, the tension in each leg increases dramatically; a 120-degree included angle creates the greatest leg tension and thus the most severe capacity reduction.

  7. According to ASME B30.2, what is the required action when a crane's load-limiting or load-indicating device is found to be malfunctioning?

    Answer: The crane must be taken out of service until the device is repaired or replaced

    ASME B30.2 requires that any crane with a malfunctioning load-limiting or load-indicating device be removed from service immediately until the device is properly repaired or replaced.