单项选择题

Pollution regulations require that each scupper in an enclosed deck area have a（）.

A.wooden plug
B.soft rubber plug
C.two-piece soft patch
D.mechanical means of closing

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单项选择题

Owing to the greater girth of a ship amidships than at the ends，certain strakes are dropped as they approach the bow and stern to reduce the amount of plating at the ends. These strakes are called（）.

A.drop strakes
B.stealers
C.throughs
D.voids

单项选择题

One function of a bulwark is to（）.

A.help keep the deck dry
B.prevent stress concentrations on the stringer plate
C.protect against twisting forces exerted on the frame of the vessel
D.reinforce the side stringers

单项选择题

On a ship，the deck stringer is the outboardmost deck（）.

A.plating
B.beam
C.stiffener
D.stanchion