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單項選擇題

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

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

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單項選擇題

For a floating vessel，the center of buoyancy and the metacenter are in the line of action of the buoyant force（）.

A.only when there is positive stability
B.only when there is negative stability
C.only when there is neutral stability
D.at all times

單項選擇題

For a floating vessel，the result of subtracting KG from KM is the（）.

A.height of the metacenter
B.height of the righting arm
C.height of the center of buoyancy
D.metacentric height