單項選擇題A number of bags are worn-out（）a certain extent.

A.at
B.in
C.on
D.to


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1.單項選擇題Allowance for fresh water refers to（）.

A.the provision to be provided when the vessel sails in fresh water area
B.the fresh water to be carried by a vessel
C.the allowance of fresh water for each crew member when in distress at sea
D.the amount of free board decreased when sailing in fresh water area

2.單項選擇題A vertical shift of weight to a position above the vessel’s center of gravity will（）.

A.increase reserve buoyancy
B.decrease the righting moments
C.decrease KG
D.increase KM

3.單項選擇題Although KG for a vessel in lightweight is relatively high，the vessel is stiff because（）.

A.KM is small
B.KM is high
C.BL is small
D.KB is large

4.單項選擇題In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to（）.

A.heel until the angle of loll is reached
B.list until the center of buoyancy is aligned vertically with the center of gravity
C.trim to the side opposite TCG until all moments are equal
D.decrease draft at the center of flotation

5.單項選擇題In the absence of external forces，the center of gravity of a floating vessel is located directly above the（）.

A.metacenter
B.amidships
C.center of flotation
D.geometric center of the displaced volume