Crane Operator Certification Exam Prep · Question
A crane operator is preparing to lift a 2,000 kg (4,400 lb) load using two slings in a choker hitch configuration. Each sling has a Working Load Limit (WLL) of 1,200 kg (2,640 lb) when used in a vertical hitch. What is the maximum sling angle (from vertical) at which this lift can be safely performed without exceeding the WLL of the slings?
In a choker hitch, the WLL of the sling is typically reduced by 25% or more compared to a vertical hitch. Therefore, for safe lifting, the load on each sling wo
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Question: A crane operator is preparing to lift a 2,000 kg (4,400 lb) load using two slings in a choker hitch configuration. Each sling has a Working Load Limit (WLL) of 1,200 kg (2,640 lb) when used in a vertical hitch. What is the maximum sling angle (from vertical) at which this lift can be safely performed without exceeding the WLL of the slings?
Answer options: ✅ 0 degrees
- 30 degrees
- 45 degrees
- 60 degrees
Correct answer: 0 degrees
Explanation: In a choker hitch, the WLL of the sling is typically reduced by 25% or more compared to a vertical hitch. Therefore, for safe lifting, the load on each sling would likely exceed its WLL even at 0 degrees, ruling out any angled lifts. In this specific scenario, a single sling in a choker hitch cannot safely lift half the load (1000 kg) given its WLL of 1200 kg in a vertical hitch.
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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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