Winch drums for lifeboat falls shall have a...

Question 1 / 2707066636eec28f7522a1c51d28f

Question 1 of 2707066636eec28f7522a1c51d28f

Winch drums for lifeboat falls shall have a diameter at the base of the groove equal to at least __________.

Question 1 of 27070

Winch drums for lifeboat falls shall have a diameter at the base of the groove equal to at least __________.

🔍 Key Concepts

• SOLAS and 46 CFR requirements for lifeboat launching appliances • Relationship between wire rope diameter and drum diameter to prevent excessive bending stress • Why safety gear often uses a minimum bending radius that is a specific multiple of the rope diameter

💭 Think About

• Think about what happens to a wire rope when it is bent around too small a drum—how does that affect fatigue and safety? • Compare the choices: which multiples would likely be too small for safe, repeated operation of a lifeboat winch? • Recall similar rules you may have seen for sheaves and drums on other marine lifting gear—are they usually closer to the smaller or larger multiples?

✅ Before You Answer

• Verify in 46 CFR the specific minimum drum diameter multiple required for lifeboat falls (not general cargo gear) • Check whether the rule distinguishes between drums and sheaves or applies the same multiple to both • Confirm that the multiple is intended to reduce bending stress and wire fatigue during frequent lowering/hoisting of lifeboats

Question 1 of 27070

Winch drums for lifeboat falls shall have a diameter at the base of the groove equal to at least __________.

6 times the diameter of the wire rope

8 times the diameter of the wire rope

12 times the diameter of the wire rope

16 times the diameter of the wire rope

Question 1 / 2707066636eec28f7522a1c51d28f

Question 1 of 2707066636eec28f7522a1c51d28f

Winch drums for lifeboat falls shall have a diameter at the base of the groove equal to at least __________.

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Question 1 of 27070

Winch drums for lifeboat falls shall have a diameter at the base of the groove equal to at least __________.