Crane Operator Certification Exam Prep · Question
During a pre-operational check of a hydraulic crane, the operator notices that two outrigger floats are embedded approximately 5 cm (2 inches) into the ground. What is the most appropriate action?
Outrigger floats embedding into the ground by 5 cm (2 inches) or more indicates inadequate ground bearing capacity or insufficient cribbing. This unstable condi
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Question: During a pre-operational check of a hydraulic crane, the operator notices that two outrigger floats are embedded approximately 5 cm (2 inches) into the ground. What is the most appropriate action?
Answer options:
- Continue with the lift, as this slight embedment indicates good soil compaction.
- Increase the outrigger spread to distribute the load more widely. ✅ Halt operations and reposition the crane or use larger/additional cribbing to achieve stable support.
- Reduce the load radius to decrease ground pressure on the outrigger floats.
Correct answer: Halt operations and reposition the crane or use larger/additional cribbing to achieve stable support.
Explanation: Outrigger floats embedding into the ground by 5 cm (2 inches) or more indicates inadequate ground bearing capacity or insufficient cribbing. This unstable condition must be corrected by repositioning the crane, using larger floats, or adding more substantial cribbing before any lifting operations commence.
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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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