單項(xiàng)選擇題

An unstable upright equilibrium position on a vessel means that the metacenter is（）.

A.lower than the center of gravity
B.at the same height as the center of gravity
C.higher than the baseline
D.on the longitudinal centerline

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單項(xiàng)選擇題

An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.

A.free surface effects are reduced due to pocketing
B.KG is reduced as the vessel seeks the angle of loll
C.effective beam is increased causing BM to increase
D.underwater volume of the hull is increased

單項(xiàng)選擇題

At all angles of inclination，the metacenter is（）.

A.vertically above the center of buoyancy
B.vertically above the center of gravity
C.at the intersection of the upright vertical centerline and the line of action of the buoyant force
D.at the geometric center of the underwater volume

An unstable upright equilibrium position on a vessel means that the metacenter is（）.

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An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.

At all angles of inclination，the metacenter is（）.

At all angles of inclination，the metacenter is（）.