海船船员考试
单选题The center of buoyancy and the metacenter are in the line of action of the buoyant force（）.A only when there is positive stabilityB only when there is negative stabilityC only when there is neutral stabilityD at all times
题目
only when there is positive stability
only when there is negative stability
only when there is neutral stability
at all times
相似问题和答案
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
船舶不稳定的正浮平衡状态意味着稳心高度低于重心高度。
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
对于漂浮的船舶，浮心和横稳心一直都在浮力的作用线上。
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
当存在外力时，倾斜船舶的浮心垂直对齐稳心。（浮心和稳心在同一垂面上）
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
在所有的倾斜角中，横稳心在浮心的垂直上方。
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
在小倾角稳性时，当有外力存在，浮力应通过浮心和稳心垂直向上。
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
一漂浮船舶的各项重力的合力在重心处。
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