Crane Operator Certification Exam Prep · Question
Which component of a hoist system is responsible for preventing the drum from rotating in the lowering direction when the brake is not engaged?
A pawl and ratchet mechanism, often found in mechanical hoist systems or as a backup, directly prevents the drum from reversing under load. Hydraulic control va
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Question: Which component of a hoist system is responsible for preventing the drum from rotating in the lowering direction when the brake is not engaged?
Answer options: ✅ Pawl and ratchet mechanism
- Hydraulic control valve
- Line speed indicator
- Load cell
Correct answer: Pawl and ratchet mechanism
Explanation: A pawl and ratchet mechanism, often found in mechanical hoist systems or as a backup, directly prevents the drum from reversing under load. Hydraulic control valves direct fluid, line speed indicators display speed, and load cells measure force, but do not prevent rotation.
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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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