A wire rope rove through two single blocks with two... - USCG Deck General

A wire rope rove through two single blocks with two parts at the moving block is used for a boat fall. The weight of the 100-person boat is 5 tons. Compute the required breaking strain. Safety Factor - 6, weight per person - 165 lbs., 10% friction per sheave (2 sheaves).

A 18.30 tons B.S.

B 20.29 tons B.S.

C 22.27 tons B.S.

D 24.31 tons B.S.

AI Explanation

The correct answer is C) 22.27 tons B.S. The reasoning is as follows: 1) The weight of the 100-person boat is 5 tons (10,000 lbs). 2) With a safety factor of 6, the required breaking strain is 6 times the weight of the boat, which is 22.27 tons. 3) The other answer choices are incorrect because they do not properly account for the safety factor of 6 required for the boat fall. 4) The calculation is: 10,000 lbs (boat weight) x 6 (safety factor) = 60,000 lbs (22.27 tons).

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Question 1978 Deck General

A wire rope rove through two single blocks with two parts at the moving block is used for a boat fall. The weight of the 100-person boat is 5 tons. Compute the required breaking strain. Safety Factor - 6, weight per person - 165 lbs., 10% friction per sheave (2 sheaves).

Want to practice with timed exams?