Crane Operator Certification Exam Prep · Question
A contractor is planning to lift a prefabricated structural steel beam weighing 22,000 kg. If the company's critical lift threshold is defined as any lift exceeding 75% of the crane's rated capacity, what minimum rated capacity (at the given radius) would make this NOT a critical lift?
To find the minimum rated capacity (C) where 22,000 kg is NOT critical, it must be less than or equal to 75% of C. So, 22,000 kg / 0.75 = 29,333.33 kg. Therefor
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Question: A contractor is planning to lift a prefabricated structural steel beam weighing 22,000 kg. If the company's critical lift threshold is defined as any lift exceeding 75% of the crane's rated capacity, what minimum rated capacity (at the given radius) would make this NOT a critical lift?
Answer options: ✅ 29,333 kg
- 28,250 kg
- 30,000 kg
- 27,500 kg
Correct answer: 29,333 kg
Explanation: To find the minimum rated capacity (C) where 22,000 kg is NOT critical, it must be less than or equal to 75% of C. So, 22,000 kg / 0.75 = 29,333.33 kg. Therefore, a rated capacity of 29,333 kg or more would make it not critical.
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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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