Crane Operator Certification Exam Prep · Question
A crane's load chart shows capacities for various boom lengths and radii. If a specific radius required for a lift falls between two radii listed on the chart, how should the operator determine the crane's capacity?
When interpolating capacities on a load chart, always use the capacity for the next larger radius to ensure a safe, more conservative capacity is applied, as ca
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Question: A crane's load chart shows capacities for various boom lengths and radii. If a specific radius required for a lift falls between two radii listed on the chart, how should the operator determine the crane's capacity?
Answer options: ✅ Use the capacity for the next larger radius listed.
- Use the capacity for the next smaller radius listed.
- Average the capacities of the two closest radii.
- Extrapolate the capacity based on a linear trend.
Correct answer: Use the capacity for the next larger radius listed.
Explanation: When interpolating capacities on a load chart, always use the capacity for the next larger radius to ensure a safe, more conservative capacity is applied, as capacity decreases with increasing radius.
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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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