Crane Operator Certification Exam Prep · Question
A crane operator is using a synthetic web sling with a rated capacity of 5,000 kg in a vertical hitch. If the operator transitions to a choker hitch configuration, what derating factor should be applied to the sling's rated capacity?
When a synthetic web sling is used in a choker hitch, its rated capacity is typically derated by a factor of 0.8 (or 80%) compared to its vertical hitch capacit
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Question: A crane operator is using a synthetic web sling with a rated capacity of 5,000 kg in a vertical hitch. If the operator transitions to a choker hitch configuration, what derating factor should be applied to the sling's rated capacity?
Answer options:
- 0.5 ✅ 0.8
- 1.0
- 1.2
Correct answer: 0.8
Explanation: When a synthetic web sling is used in a choker hitch, its rated capacity is typically derated by a factor of 0.8 (or 80%) compared to its vertical hitch capacity. The choker hitch creates stress and friction at the choke point, reducing the sling's efficiency and capacity.
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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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