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單項(xiàng)選擇題

A crack in the deck plating of a vessel may be temporarily prevented from increasing in length by（）.

A.cutting a square notch at each end of the crack
B.drilling a hole at each end of crack
C.slot-welding the crack
D.welding a doubler over the crack

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單項(xiàng)選擇題

A dangerous cargo manifest is needed for you to carry a combustible cargo. You should obtain the shipping papers to mark this manifest from the（）.

A.manufacturer
B.CCS
C.HAS
D.shipper

單項(xiàng)選擇題

A deadhead is a (n)（）.

A.tree or long awash in a nearly vertical position
B.crew member who refuses to work
C.upstream end of a load wall
D.buoy that is adrift

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