USCG Exam Practice · Deck equipment — winches, capstans, windlasses
During a biennial proof load test of cargo gear, at what angle must the boom or derrick be positioned when the proof load is applied?
- AAt the highest practicable angle to maximize mechanical advantage
- BAt 45 degrees from horizontal as a standard test angle
- CAt the lowest practicable angle✓ correct
- DAt the angle specified by the gear manufacturer
Why C is correct
46 CFR §28.885(c) states that the proof load shall be lifted with the ship's normal tackle with the boom or derrick at the lowest practicable angle. After the load is lifted, it must be swung as far as possible in both directions.
Cited:46 CFR §28.885
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