单项选择题

The original equilibrium position is stable when（）.

A.metacentric height is positive
B.metacentric radius is positive
C.KG exceeds maximum allowable limits
D.free surfaces are excessive

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单项选择题

A.negative GM
B.progressive flooding
C.structural failure
D.an immediate need to ballast

单项选择题

A.center of gravity
B.center of buoyancy
C.center of flotation
D.metacenter

单项选择题

A.increase the trim
B.change the free surface effect
C.cause a serious list
D.decrease ship stability