Mobile Crane Operator — Core Knowledge
Crane types and components: practice questions
Our Crane Operator bank has 12 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 does the hook latch (safety latch) do?
- Locks the swing
- Increases the hook's rated capacity by locking the load in place
- Prevents slings from slipping off the hook
- Measures weight
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C. Prevents slings from slipping off the hook — Latches must be in good working order unless OSHA allows otherwise.
Question 2
What does the swing bearing do?
- Lifts the load
- Allows the upper structure to rotate on the carrier
- Extends and retracts the telescopic boom sections when the operator moves the lever
- Levels the crane
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B. Allows the upper structure to rotate on the carrier — Swing brakes and locks hold position.
Question 3
What is a sheave?
- A boom section
- A type of synthetic sling used for lifting finished surfaces
- A grooved wheel that guides the wire rope
- A brake
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C. A grooved wheel that guides the wire rope — Sheaves must be sized and maintained properly.