Crane Operator Certification Exam Prep · Question
A crane's load chart shows capacities for outriggers fully extended (100%) and 50% extended. Under what circumstances would an operator use the 50% extended outrigger chart?
If site conditions (e.g., obstacles, proximity to public, narrow access) prevent full extension of all outriggers, and the manufacturer provides a specific load
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Question: A crane's load chart shows capacities for outriggers fully extended (100%) and 50% extended. Under what circumstances would an operator use the 50% extended outrigger chart?
Answer options: ✅ When site conditions prevent full extension of all outriggers, but partial extension is possible.
- Only for pick-and-carry operations without fully extending any outriggers.
- To increase the crane's lifting capacity beyond the fully extended chart.
- Never, as extending outriggers less than 100% is always prohibited.
Correct answer: When site conditions prevent full extension of all outriggers, but partial extension is possible.
Explanation: If site conditions (e.g., obstacles, proximity to public, narrow access) prevent full extension of all outriggers, and the manufacturer provides a specific load chart for reduced extension, the operator must utilize that chart. This ensures the crane remains within safe operating parameters as per CSA Z150. Operating outside chart parameters is prohibited.
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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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