Crane Operator Certification Exam Prep · Question
A crane's load chart, for a particular boom length and radius, shows a rated capacity of 10,000 kg. The operator intends to lift a precast beam weighing 8,500 kg. The rigging setup includes a 400 kg main hoist block, 100 kg of wire rope reeved on the block, and 250 kg of slings and shackles. What is the percentage of the remaining available capacity after accounting for the load and deductions?
First, calculate total deductions: 400 kg (block) + 100 kg (reeving) + 250 kg (rigging) = 750 kg. Then, calculate the total weight acting on the crane: 8,500 kg
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Question: A crane's load chart, for a particular boom length and radius, shows a rated capacity of 10,000 kg. The operator intends to lift a precast beam weighing 8,500 kg. The rigging setup includes a 400 kg main hoist block, 100 kg of wire rope reeved on the block, and 250 kg of slings and shackles. What is the percentage of the remaining available capacity after accounting for the load and deductions?
Answer options: ✅ 7.5%
- 15.0%
- 10.0%
- 5.0%
Correct answer: 7.5%
Explanation: First, calculate total deductions: 400 kg (block) + 100 kg (reeving) + 250 kg (rigging) = 750 kg. Then, calculate the total weight acting on the crane: 8,500 kg (load) + 750 kg (deductions) = 9,250 kg. The remaining available capacity is 10,000 kg - 9,250 kg = 750 kg. As a percentage: (750 kg / 10,000 kg) * 100% = 7.5%.
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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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