单项选择题Before counterflooding to correct a list,you must be sure the list is due to().

A.negative GM
B.flooding
C.off-center weight
D.reserve buoyancy


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1.单项选择题At an angle of loll,the righting arm (GZ) is().

A.maximum
B.negative
C.positive,but reflexive
D.zero

2.单项选择题At an angle of loll,the capsizing moment is().

A.maximum
B.negative
C.positive
D.zero

3.单项选择题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

4.单项选择题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

5.单项选择题Angular motion about the vertical axis of a vessel is called().

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

7.单项选择题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

8.单项选择题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

10.单项选择题A vessel is tender if cargo weight is().

A.concentrated high and the double bottoms empty
B.concentrated low and the double bottoms empty
C.evenly distributed vertically with the double bottoms full
D.concentrated and with the double bottoms full