Question 531General Subjects - Assistant Engineer

70% to pass

Concerning a conventional mooring winch, what statement is true?

AA high capacity brake is required to hold a load equal to the breaking strength of the mooring line. For reasons of safety, no slippage of the brake is permitted.

BA high capacity brake is required to hold a load exceeding the breaking strength of the mooring line. For reasons of safety, no slippage of the brake is permitted.

CA high capacity brake is required to hold a load approaching the breaking strength of the mooring line, but it is required to slip at a lower tension to avoid mooring line breakage.

DA low capacity brake is required to hold a load far below the breaking strength of the mooring line, but it is required to slip at a lower tension to avoid mooring line breakage.

AI Explanation

The correct answer is C. A high capacity brake is required to hold a load approaching the breaking strength of the mooring line, but it is required to slip at a lower tension to avoid mooring line breakage. This is because if the brake could hold the full breaking strength of the mooring line, the line itself could break, which would be unsafe. The brake is designed to slip at a lower tension to prevent the line from breaking under excessive loads. The other options are incorrect because A and B do not allow for any slippage of the brake, which is necessary to avoid line breakage, while D requires a low capacity brake, which would not be able to hold loads approaching the line's breaking strength.