Crane Operator Certification Exam Prep · Question
During a heavy lift with a hydraulic crane, the load capacity indicator alarm sounds, and the operator realizes the crane is at risk of overturning. The load is partially suspended. What immediate action should the operator take to prevent a critical incident?
To prevent overturning, the operator must immediately reduce the load moment. This is best achieved by booming down and retracting the boom, which reduces the o
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Question: During a heavy lift with a hydraulic crane, the load capacity indicator alarm sounds, and the operator realizes the crane is at risk of overturning. The load is partially suspended. What immediate action should the operator take to prevent a critical incident?
Answer options:
- Rapidly lower the load to the ground.
- Maintain the current position and call the supervisor. ✅ Boom down and retract, while simultaneously lowering the load if possible, to reduce radius and load moment.
- Slew the boom to bring the load directly over the outriggers.
Correct answer: Boom down and retract, while simultaneously lowering the load if possible, to reduce radius and load moment.
Explanation: To prevent overturning, the operator must immediately reduce the load moment. This is best achieved by booming down and retracting the boom, which reduces the operating radius. Simultaneously lowering the load, if safely possible, further decreases the moment. Rapidly lowering the load or swinging it could worsen stability depending on the situation.
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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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