Mobile Crane Operator — Core Knowledge
Wire rope: practice questions
Our Crane Operator bank has 13 questions on this topic. Here are 3 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
What is birdcaging in wire rope?
- Lubrication
- Strands separating and bulging out, often from shock loading or sudden release
- Normal wear
- Rust only
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B. Strands separating and bulging out, often from shock loading or sudden release — It requires removal from service.
Question 2
What is a 'lay' of wire rope?
- The number of wires in each strand of the rope
- The diameter of the rope measured across its strands
- The length along the rope in which one strand makes a full turn around the core
- The way the rope is stored on a reel when not in use
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C. The length along the rope in which one strand makes a full turn around the core — Broken-wire counts are measured per lay.
Question 3
What must be done with wire rope that has been in contact with an energized power line?
- Keep using it, since wire rope can't be harmed by electricity passing through it
- Remove it from service
- Turn it end for end and keep it in service
- Wash it with water and put it straight back to work
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B. Remove it from service — Prior electrical contact with a power line is a Category III deficiency: the rope must be removed from service (1926.1413(a)(4)(iii)).