NCCCO Rigger 1 Study Questions and

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

size, grade, rated capacity for hitch type that can be used? - Alloy steel chain sling

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