Crane Operator Certification Exam Prep · Question
An emergency stop button for slewing limits on a tower crane should typically act to:
An emergency stop, particularly for critical functions like slewing limits, is designed to immediately and completely cut power to the drive. This ensures the f
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Question: An emergency stop button for slewing limits on a tower crane should typically act to:
Answer options: ✅ Immediately cut all power to the slewing drive, bringing the slewing motion to an immediate halt.
- Slowly decelerate the slewing motion to a controlled stop.
- Cause the crane to automatically slew to its neutral, out-of-service position.
- Trigger an audible alarm but allow the operator to continue slewing at a reduced speed.
Correct answer: Immediately cut all power to the slewing drive, bringing the slewing motion to an immediate halt.
Explanation: An emergency stop, particularly for critical functions like slewing limits, is designed to immediately and completely cut power to the drive. This ensures the fastest possible stop of the uncontrolled motion, minimizing potential damage or hazard, in line with CCOHS and CSA Z248 safety principles for emergency controls.
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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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