Crane Operator Certification Exam Prep · Question
A mobile crane's load chart indicates a gross capacity of 18,000 kg for a specific boom length and radius. The hoisted load, including the rigging, weighs 17,500 kg. What is the maximum weight of the headache ball and hook block assembly that can be used without exceeding the crane's capacity?
The headache ball and hook block assembly are part of the 'deductions' and must be subtracted from the crane's gross capacity. Gross capacity 18,000 kg - Hoiste
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Question: A mobile crane's load chart indicates a gross capacity of 18,000 kg for a specific boom length and radius. The hoisted load, including the rigging, weighs 17,500 kg. What is the maximum weight of the headache ball and hook block assembly that can be used without exceeding the crane's capacity?
Answer options: ✅ 500 kg
- 1,000 kg
- 2,000 kg
- Included in the 17,500 kg load
Correct answer: 500 kg
Explanation: The headache ball and hook block assembly are part of the 'deductions' and must be subtracted from the crane's gross capacity. Gross capacity 18,000 kg - Hoisted Load 17,500 kg = 500 kg remaining for deductions. Therefore, the maximum weight for the headache ball and hook block is 500 kg. As per CSA Z150, deductions common to the lift must be accounted for.
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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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