Crane Operator Certification Exam Prep · Question
A crane is configured with a 30-metre main boom. The load chart provides capacities for radii incrementing by 2 metres (e.g., 8 m, 10 m, 12 m). If the chart shows 15,000 kg at 10 metres and 12,000 kg at 12 metres, what is the MAXIMUM estimated capacity at an 11-metre radius for a 30-metre boom, assuming linear interpolation is permitted by the manufacturer?
Linear interpolation calculates the capacity between two known points. The difference in radius is 2m, and capacity difference is 3,000kg. For a 1-meter increas
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Question: A crane is configured with a 30-metre main boom. The load chart provides capacities for radii incrementing by 2 metres (e.g., 8 m, 10 m, 12 m). If the chart shows 15,000 kg at 10 metres and 12,000 kg at 12 metres, what is the MAXIMUM estimated capacity at an 11-metre radius for a 30-metre boom, assuming linear interpolation is permitted by the manufacturer?
Answer options: ✅ 13,500 kg
- 14,000 kg
- 13,000 kg
- 12,500 kg
Correct answer: 13,500 kg
Explanation: Linear interpolation calculates the capacity between two known points. The difference in radius is 2m, and capacity difference is 3,000kg. For a 1-meter increase in radius, the capacity decreases by 1,500kg. So, 15,000 kg - 1,500 kg = 13,500 kg at an 11-metre radius. CSA Z150 allows interpolation only if specified by the manufacturer.
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- 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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