單項選擇題An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.

A.free surface effects are reduced due to pocketing
B.KG is reduced as the vessel seeks the angle of loll
C.effective beam is increased causing BM to increase
D.underwater volume of the hull is increased


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1.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

2.單項選擇題What is MTI?（）.

A.The foot／tons needed to trim the vessel by 1 inch
B.The foot／tons needed to trim the vessel by 1 foot
C.The moments needed to trim the vessel by 1 centimeter
D.The amount of vessel will trim when loading 100 tons 100 feet from the tipping Center

3.單項選擇題Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?（）.

A.The metacenter does not remain in the same position for large angles of inclination
B.The center of gravity shifts due to inclination
C.The center of gravity shifts above the metacenter as the vessel is inclined
D.The mean draft will change as the vessel is inclined

5.單項選擇題Deballasting a double bottom has what affect on KG?（）.

A.KG is increased
B.KG is decreased
C.KG is not affected
D.KG increases at light drafts and decreases at deep drafts