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單項(xiàng)選擇題

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

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

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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