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


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1.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

2.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

3.單項選擇題A serious loss of reserve buoyancy resulting from flooding any compartment of a ship will always（）.

A.increase the trim
B.change the free surface effect
C.cause a serious list
D.decrea e ship stabilty

4.單項選擇題A shore is a piece of securing dunnage that（）.

A.runs from a low supporting level up to the cargo at an angle
B.is also known as a distance piece
C.is placed on the deck under the cargo to distribute its weight evently
D.is run horizontally from a support to the cargo