In the absence of external forces, the center of gravity of

The righting moment can be determined by multiplying the displacement by the ______．

A.vertical center of gravity（KG）

B.longitudinal center of gravity（LCG）

C.righting arm（GZ）

D.center of gravity（CG）

For a floating vessel, the center of flotation is the point in the waterplane ______.

A.about which the vessel lists and trims

B.which coincides with the center of buoyancy

C.which, in the absence of external forces, is always vertically aligned with the center of gravity

D.which is shown in the hydrostatic tables as VCB

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

With no environmental forces acting on the vessel，the center of gravity of an inclined vessel is vertically aligned with the ______．

A.longitudinal centerline

B.center of flotation

C.original vertical centerline

D.metacenter

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

A vessel is inclined at an angle of loll. In the absence of external forces，the righting arm (GZ) is ______.

A.positive

B.negative

C.zero

D.vertical