單項選擇題A neutral equilibrim position for a vessel means that the metacenter is（）.

A.lower than the keel
B.at the same height as the center of gravity
C.exactly at midships
D.at the center of the waterplane area


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1.單項選擇題A new technique（）,the producity of loading as a whole increased by 20 percent.

A.working out
B.having been worked out
C.having worked out
D.to have been worked out

2.單項選擇題A partial deck in a hold is called a (an)（）.

A.weather deck
B.orlop deck
C.shelter deck
D.main deck

3.單項選擇題A petroleum liquid has a flashpoint of 85°C . This liquid is in IMDG code classed as a（）.

A.flammable liquid
B.nonflammable liquid
C.inflammable liquid
D.disflammable liquid

4.單項選擇題A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases?（）.

A.In the lower level of the pumproom
B.In the middle level of the pumproom
C.In the upper lever of the pumproom
D.On the deck outside the pumproom

5.單項選擇題A quick and rapid motion of a vessel in a seaway is an indication of a (n)（）.

A.large GM
B.high center of gravity
C.excessive free surface
D.small GZ