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NCCCO Rigger 1 Study Questions with complete solutions
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NCCCO Rigger 1 Study Questions with complete solutions
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NCCCO Rigger 1 Study Questions1. A wire rope that is a 6x19 classification could have how many wires per strand? - correct answer ✔✔15 through 26 wires per strand
2. How often should a synthetic web sling be inspected? - correct answer ✔✔Each day before use
3. Which considerations should be given to suspend lifting operations with a mobile crane? - correct answer ✔✔Winds in excess of 35 mph
4. What is the term that best describes surface wear on a wire rope sling to rubbing or sliding? - correct answer ✔✔Abrasion
5. Which of the following defects discovered during an inspection would cause for removing a wire rope sling from service? - correct answer ✔✔Ten broken wires in one lay
6. According to OSHA, each day before being used, all rigging hardware and slings shall be inspected for damage or defects by a? - correct answer ✔✔Competent person
7. When the hoist line is not vertical what type of dynamic force is being introduced to the crane? - correct answer ✔✔Side pull
8. What is the term used to describe the ultimate or maximum load that a sling fails at ? - correct answer
✔✔Breaking strength
9. A non-shouldered eyebolt is primarily designed for lifting in which plane ? - correct answer ✔✔Vertical
10. 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? - correct answer ✔✔1/2 the length 11. 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? - correct answer ✔✔Shock loading
12. 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? - correct answer ✔✔A2+B2=C2 look at paper
13. What is the approximate weight of one cubic foot of steel ? - correct answer ✔✔480 pounds (lbs)
14. Which type of sling is required to have permanent affixed identification tag stating size, grade, rated capacity for hitch type that can be used? - correct answer ✔✔Alloy steel chain sling
15. Where would you measure to check the diameter of wire rope? - correct answer ✔✔Across the crowns
16. How is the working load limit of slings determined? - correct answer ✔✔Divide the breaking strength
by the design factor
17. What is the formula used to find volume of a rectangle? - correct answer ✔✔Length x height x width
18. The tag on a synthetic web sling shall have what required information on it ? - correct answer ✔✔Name of manufacturer
Rated load for each hitch type
and type of material
19. One leg of a four leg alloy steel chain sling is longer than the other three; this is possible indication of
what type of damage ? - correct answer ✔✔The leg has been over loaded
20. Using a cheater pipe on a chain hoist come along what will it give you ? - correct answer ✔✔More leverage
21. What type of hitches provides maximum contact between the sling and the load? - correct answer ✔✔Double wrap choker/ double wrap basket
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