Crane Operator Certification Exam Prep · Question
A mobile crane, with a boom length of 25 metres, is set up with outriggers fully extended. The load chart indicates a capacity of 10,000 kg at a 12-metre radius. If the crane operator needs to lift a 9,000 kg load, what is the maximum radius allowed for this lift, assuming the boom length remains at 25 metres and other conditions are constant?
Load charts specify maximum capacities for given boom lengths and radii. To lift a 9,000 kg load, the operator must stay within or at the 12-metre radius becaus
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Question: A mobile crane, with a boom length of 25 metres, is set up with outriggers fully extended. The load chart indicates a capacity of 10,000 kg at a 12-metre radius. If the crane operator needs to lift a 9,000 kg load, what is the maximum radius allowed for this lift, assuming the boom length remains at 25 metres and other conditions are constant?
Answer options: ✅ 12 metres
- 14 metres
- 10 metres
- 11 metres
Correct answer: 12 metres
Explanation: Load charts specify maximum capacities for given boom lengths and radii. To lift a 9,000 kg load, the operator must stay within or at the 12-metre radius because the chart shows 10,000 kg capacity at that radius, which is sufficient. Moving further out would decrease capacity below requirements.
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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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