The center of buoyancy is located at the（）.

Cross curves of stability show which of the following？

A.The righting arms at various angles of inclination and displacement

B.The metacentric height at large angles of heel

C.The height of the center of buoyancy at various angles

D.The metacentric radius at various displacements

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

此题为判断题(对，错)。

In small angle stability, when external forces exist, the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the ______.

A.center of gravity

B.center of flotation

C.metacenter

D.metacentric height

Jettisoning weight from topside ______.

A.returns the vessel to an even keel

B.reduces free surface effect

C.lowers the center of gravity

D.raises the center of buoyancy

If a vessel lists to port, the center of buoyancy will ______.

A.move to port

B.move to starboard

C.move directly down

D.stay in the same position

In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to ().

A.heel until the angle of loll is reached

B.list until the center of buoyancy is aligned vertically with the center of gravity

C.trim to the side opposite TCG until all moments are equal

D.decrease draft at the center of flotation

In the presence of external forces, the center of buoyancy of an inclined vessel is vertically aligned with the ______.

A.center of gravity

B.metacenter

C.center of flotation

D.Keel