Crane Operator Certification Exam Prep · Question
A 10-tonne concrete panel needs to be lifted with a mobile crane. The project's critical lift threshold is set at 80% of the crane's rated capacity at the planned radius. If the crane selected has a rated capacity of 12.5 tonnes at this radius, is this considered a critical lift?
To determine if it's a critical lift: (10 tonnes / 12.5 tonnes) * 100% = 80%. Since the lift meets or exceeds the 80% threshold, it is indeed considered a criti
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Question: A 10-tonne concrete panel needs to be lifted with a mobile crane. The project's critical lift threshold is set at 80% of the crane's rated capacity at the planned radius. If the crane selected has a rated capacity of 12.5 tonnes at this radius, is this considered a critical lift?
Answer options: ✅ Yes, because 10 tonnes is exactly 80% of 12.5 tonnes.
- No, because the load is exactly 80% and not exceeding it.
- Yes, because critical lift thresholds are usually set lower, around 75%.
- No, because 12.5 tonnes is the maximum, and 10 tonnes is well within limits.
Correct answer: Yes, because 10 tonnes is exactly 80% of 12.5 tonnes.
Explanation: To determine if it's a critical lift: (10 tonnes / 12.5 tonnes) * 100% = 80%. Since the lift meets or exceeds the 80% threshold, it is indeed considered a critical lift according to the project's parameters.
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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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