Crane Operator Certification Exam Prep · Question
During a lift, the operator observes the headache ball contacting the tip of the main boom. What is the most appropriate action to prevent two-blocking?
Two-blocking occurs when the headache ball or hook block contacts the boom tip, which can damage the hoist rope or boom. Hoisting down immediately increases the
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Question: During a lift, the operator observes the headache ball contacting the tip of the main boom. What is the most appropriate action to prevent two-blocking?
Answer options:
- Telescope the boom out slowly. ✅ Hoist down the load slightly.
- Increase the boom angle.
- Engage the anti-two block bypass system.
Correct answer: Hoist down the load slightly.
Explanation: Two-blocking occurs when the headache ball or hook block contacts the boom tip, which can damage the hoist rope or boom. Hoisting down immediately increases the distance and prevents this dangerous condition.
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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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