單項選擇題When working with lumber, wire and staples are not desirable to be used because（）.

A.they are not subjected to cause trouble
B.they are difficult to handle this kind of cargo
C.the efficiency of separating is raised
D.the efficiency of loading is greater


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1.單項選擇題Which is the summer load waterline on the load waterline mark?（）.

A.The first line at the bottom
B.The second line from the bottom
C.The third line from the bottom
D.The fourth line from the bottom

2.單項選擇題Which of the following is more important in determining the amount of free surface that will be produced?（）.

A.The breath of the tank
B.The length of the tank
C.The amount of liquid in the tank
D.The position of the tank in relation to the center line of the vessel

3.單項選擇題Which of the following is more important in determining the amount of free surface that will be produced?（）.

A.Outside temperature
B.Dewpoint of the outside air
C.Dewpoint of the air in the cargo hold
D.Temperature of the cargp

4.單項選擇題Which of the following is more suitable for bagged cargo?（）.

A.Hydraulically operated pusher
B.Spread beam sling
C.Revolving roll clamping device
D.Platform sling

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

A.The metacenter does not remain in the same position for large angles of inclination
B.The center of gravity shift 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 inclinded