單項(xiàng)選擇題

Deballasting a double bottom has what affect on KG（）.

A.KG is increased
B.KG is decreased
C.Kgis not affected
D.KG increases at light drafts and decrease at deep drafts

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單項(xiàng)選擇題

Deficient oxygen content inside a chain locker can be detected with（）.

A.litmus paper
B.a combustible gas indicator
C.an oxygen breathing apparatus
D.an oxygen indicator

單項(xiàng)選擇題

Displacement refers to the（）.

A.cubic capacity of a vessel
B.deadweight carring capacity of a vessel
C.gross tonnage of vessel
D.number of long tons of water displaced by a vessel afloat