單項選擇題What will NOT decrease the stability of a vessel?（）

A.Topside icing
B.Running with a following sea
C.Using 35% of the fuel in a full tank
D.Lowering a weight suspended by a boom onto the deck


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1.單項選擇題What is used as an indicator of initial stability? （）

A.GM
B.KG
C.KM
D.GZ

2.單項選擇題What is the stability term for the distance from the center of gravity (G) to the Metacenter (M)，when small-angle stability applies? （）

A.metacentric height
B.metacentric radius
C.height of the metacenter
D.righting arm

3.單項選擇題What is the principal danger from the liquid in a half full tank onboard a vessel?（）

A.Corrosion from the shifting liquid
B.Rupturing of bulkheads from the shifting liquid
C.Loss of stability from free surface effect
D.Holing of the tank bottom from the weight of the shifting liquid

4.單項選擇題What is the definition of transverse metacenter?（）

A.The distance between the actual center of gravity and the maximum center of gravity that will still allow a positive stability
B.The point to which G may rise and still permit the vessel to possess positive stability
C.The sum of the center of buoyancy and the center of gravity
D.The transverse shift of the center of buoyancy as a vessel rolls

5.單項選擇題To prevent loss of stability from free communication flooding you should（）.

A.close the cross-connection valve between the off-center tanks
B.completely flood high center tanks
C.ballast double bottom wing tanks
D.close any opening to the sea in an off-center tank