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NCCCO Rigger 1 Study Questions and answers
- A wire rope that is a 6x19 classification could have how many wires per strand? - 15
through 26 wires per strand
- How often should a synthetic web sling be inspected? - Each day before use
- Which considerations should be given to suspend lifting operations with a mobile
crane? - Winds in excess of 35 mph
- What is the term that best describes surface wear on a wire rope sling to rubbing or
sliding? - Abrasion
- Which of the following defects discovered during an inspection would cause for
removing a wire rope sling from service? - Ten broken wires in one lay
- According to OSHA, each day before being used, all rigging hardware and slings
shall be inspected for damage or defects by a? - Competent person
- When the hoist line is not vertical what type of dynamic force is being introduced to
the crane? - Side pull
- What is the term used to describe the ultimate or maximum load that a sling fails at ?
- Breaking strength
- A non-shouldered eyebolt is primarily designed for lifting in which plane ? - Vertical
- According to ASME B30.9, (Slings) what is the maximum width of an object that can
be placed in the eye of a wire rope sling? - 1/2 the length
- What is the term used to describe a sudden or unplanned loading of the crane when
raising or lowering a load that will increase the stress on rigging and the load? - Shock loading
- What formula is used to determine the sling length when you only know the hook
height and the distance from the center of gravity to the pick point? - A2+B2=C2 look at paper
- What is the approximate weight of one cubic foot of steel ? - 480 pounds (lbs)
- Which type of sling is required to have permanent affixed identification tag stating
- / 1
size, grade, capacity for hitch type that can be used? - Alloy steel chain sling
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