only when there is positive stability
only when there is negative stability
only when there is neutral stability
at all times
第1题:
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
第2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3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4题:
at a lower level than the baseline
on the longitudinal centerline
higher than the center of gravity
at amidships
第5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6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7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8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9题:
metacentric height
height of the righting arm
fore and aft perpendicular
height of the center of buoyancy
第10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