單項(xiàng)選擇題

A shroud is（）.

A.any wire running fore-and-aft on a ship
B.any wire with a fiber core
C.a heavy wire extending from the trunk of the mast to the head of the boom
D.a heavy wire extending from the mast，atwartships to the deck，to support the mast

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單項(xiàng)選擇題

A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases?（）.

A.In the lower level of the pumproom
B.In the middle level of the pumproom
C.In the upper level of the pumproom
D.On the deck outside the pumproom

單項(xiàng)選擇題

A partial deck in a hold is called a(n)（）.

A.weather deck
B.orlop deck
C.shelter deck
D.main deck