单项选择题
When choosing extinguishers to fight a Class “B” fire do NOT use（）.
A.carbon dioxide
B.dry chemical
C.foam (stored-pressure type)
D.water (cartridge-operated)
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单项选择题
What should be used to steer an open lifeboat if the rudder becomes lost or damaged?（）
A.Sea anchor
B.Steering oar
C.Spare rudder
D.Daggerboard -
单项选择题
Vessel’s provisions refer to（）of the vessel.
A.fuel oil
B.vegetables and food
C.spare parts on board
D.ballast water -
单项选择题
To clean a dirty fiber towing hawser used in ocean towing，you should（）.
A.use lye or other mild detergent
B.wash it with fresh water，dry and store it
C.wash it with salt water
D.use cleaning fluid on nylon，dacron and other synthetic lines
