center of buoyancy
center of flotation
uncorrected height of the center of gravity of the vessel
center of gravity of the vessel corrected for free surface effects
第1题：
______ can be regarded as a vessel restricted in her ability to maneuver．
A.Any aircraft designed to maneuver on the water
B.A vessel engaged in dredging，surveying or underwater operations
C.A vessel under sail provided that propelling machinery is not used
D.A small vessel sailing at night
第2题：
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
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：
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
第5题：
A floating vessel will behave as if all of its weight is acting downward through the ______.
A.center of gravity
B.center of buoyancy
C.center of floation
D.Metacenter
第6题：
A ship lists and trims about the ______．
A.Center of gravity
B.Center of buoyancy
C.Center of flotation
D.Centroid of the underwater volume
第7题：
The free surface corrections depend upon the dimensions of the surface of the free liquids and the ______．
A.volume of liquid in the tank
B.displacement of the vessel
C.location of the tank in the vessel
D.height of the center of gravity of the vessel
第8题：
The center of volume of the immersed portion of the hull is called the ______.
A.center of buoyancy
B.center of floation
C.center of gravity
D.tipping center
第9题：
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
第10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