單項選擇題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


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1.單項選擇題As a ship moves through the water,it causes a wake,which is also moving forward relative to the sea. In addition to a fore and aft motion,this wake also has a(n)().

A.downward and inward flow
B.downward and outward flow
C.upward and inward flow
D.upward and outward flow

2.單項選擇題Angular motion about the vertical axis of a vessel is called().

A.yaw
B.surge
C.sway
D.roll

4.單項選擇題All of the following can be determined by use of a stabilogauge EXCEPT().

A.metacentric height
B.mean draft
C.moment to trim one inch
D.deadweight

5.單項選擇題A vessel with a small GM will().

A.have a large amplitude of roll
B.provide a comfortable ride for the crew and passengers
C.have drier decks in heavy weather
D.be likely to have cargo shift in heavy weather