單項選擇題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.單項選擇題At an angle of loll,the righting arm (GZ) is().

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

2.單項選擇題At an angle of loll,the capsizing moment is().

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

3.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

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

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