單項(xiàng)選擇題

A block and tackle is rove to advantage. This means that the（）.

A.blocks have been overhauled
B.hauling parts of two tackles are attached
C.hauling part leads through the movable block
D.hauling part leads through the standing block

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單項(xiàng)選擇題

A bilge suction line，in a fishing vessel with more than 16 individuals aboard，must have a strainer with an open area not less than how many times the open area of the suction line?（）

A.one
B.two
C.three
D.four

單項(xiàng)選擇題

Limber is a term associated with（）.

A.emergency gear
B.drainage
C.deck cargo storage
D.securing gear

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A block and tackle is rove to advantage. This means that the（）.

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A bilge suction line，in a fishing vessel with more than 16 individuals aboard，must have a strainer with an open area not less than how many times the open area of the suction line?（）

Limber is a term associated with（）.

A bilge suction line，in a fishing vessel with more than 16 individuals aboard，must have a strainer with an open area not less than how many times the open area of the suction line?（）