Crane Operator Certification Exam Prep · Question
Prior to lifting operations, the crane operator performs a critical inspection of the main hoist hook. Which of the following conditions would necessitate immediate removal of the hook from service?
Hooks must be removed from service if there is any deformation, such as a twist exceeding 10 degrees from the original plane, or an increase in the throat openi
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Question: Prior to lifting operations, the crane operator performs a critical inspection of the main hoist hook. Which of the following conditions would necessitate immediate removal of the hook from service?
Answer options:
- Minor surface scratches on the outside of the hook body.
- A paint chip revealing bare metal on the hook's shank. ✅ Visible twist of 15 degrees from the original plane.
- Slight discoloration due to normal wear and tear.
Correct answer: Visible twist of 15 degrees from the original plane.
Explanation: Hooks must be removed from service if there is any deformation, such as a twist exceeding 10 degrees from the original plane, or an increase in the throat opening exceeding 15%. A 15-degree twist certainly exceeds this and indicates structural damage.
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Question explanations
- According to most Canadian provincial regulations, who is ultimately responsible for the safe operation of a c
- A crane's rated capacity decreases as the load radius:
- What is the minimum number of full wraps of wire rope that must remain on a hoist drum when the hook is in its
- Before setting up a mobile crane, what is the most important factor to assess regarding ground conditions?
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