Crane Operator Certification Exam Prep · Question
A crane operator is lifting a 1,500 kg concrete pipe using a polyester round sling in a choker hitch. The sling has a vertical WLL of 3,000 kg. What should be the choker hitch WLL for this sling?
For polyester round slings, the choker hitch derating factor is typically 0.8. Therefore, the choker hitch WLL would be the vertical WLL multiplied by 0.8. In t
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Question: A crane operator is lifting a 1,500 kg concrete pipe using a polyester round sling in a choker hitch. The sling has a vertical WLL of 3,000 kg. What should be the choker hitch WLL for this sling?
Answer options:
- 1,500 kg
- 2,100 kg ✅ 2,400 kg
- 3,000 kg
Correct answer: 2,400 kg
Explanation: For polyester round slings, the choker hitch derating factor is typically 0.8. Therefore, the choker hitch WLL would be the vertical WLL multiplied by 0.8. In this case, 3,000 kg * 0.8 = 2,400 kg. Distractor B (2,100 kg) might be relevant for some web slings but not typically for round slings.
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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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