center of gravity
amidships station
center of flotation
geometric center of the waterplane area
第1题：
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
第2题：
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
第3题：
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
第4题：
about which the vessel lists and trims
which coincides with the center of buoyancy
which，in the absence of external forces，is always vertically aligned with the center of gravity
which is shown in the hydrostatic tables as VCB
第5题：
The distance between the actual center of gravity and the maximum center of gravity that will still allow a positive stability
The point to which G may rise and still permit the vessel to possess positive stability
The sum of the center of buoyancy and the center of gravity
The transverse shift of the center of buoyancy as a vessel rolls
第6题：
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
第7题：
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
第8题：
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
第9题：
Longitudinal center of buoyancy and longitudinal center of gravity
Longitudinal center of floatation and longitudinal center of gravity
Longitudinal center of floatation and longitudinal center of buoyancy
Longitudinal tipping center and longitudinal center of gravity
第10题：
the center of volume of the immersed portion of the vessel
the center of gravity of the water plane
that point at which all the vertical downward forces of weight are considered to be concentrated
that point at which all the vertical upward forces of buoyancy are considered to be concentrated