Crane Operator Certification Exam Prep · Question
During a pre-shift inspection, a mobile crane operator observes a wire rope sling with a section where the wire rope is bent sharply around an object with a diameter-to-wire-rope-diameter (D/d) ratio of less than 2:1. What is the immediate concern according to CSA Z150?
A D/d ratio of less than 2:1 for wire rope slings causes severe bending stress and can lead to permanent damage, reduction in strength, and premature failure, a
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Question: During a pre-shift inspection, a mobile crane operator observes a wire rope sling with a section where the wire rope is bent sharply around an object with a diameter-to-wire-rope-diameter (D/d) ratio of less than 2:1. What is the immediate concern according to CSA Z150?
Answer options:
- Risk of accelerated wear due to continuous friction. ✅ Potential for permanent deformation and strength reduction of the wire rope.
- Increased risk of sling slippage during lifting operations.
- Higher chance of corrosion at the bend point.
Correct answer: Potential for permanent deformation and strength reduction of the wire rope.
Explanation: A D/d ratio of less than 2:1 for wire rope slings causes severe bending stress and can lead to permanent damage, reduction in strength, and premature failure, as per CSA Z150 requirements for sling use and inspection.
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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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