单项选择题

Prior to magnetic particle inspection of anchor chain，the chain should be（）.

A.degaussed
B.demagnetized
C.soaked
D.sandblasted

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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

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
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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