單項(xiàng)選擇題Many dangerous cargoes are stowed on deck because of the（）.

A.danger to crew and cargo
B.necessity of periodic inspection
C.possible need to jettison
D.All of the above


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1.單項(xiàng)選擇題It is generally NOT allowed to clean up an oil spill by using（）.

A.a boom
B.suction equipment
C.chemical agents
D.skimmers

2.單項(xiàng)選擇題If your asphalt barge has operated more than 12 months in saltwater in the 24 month period since it was last dry-docked，when is it required to be hauled out again? （）

A.12 months since last dry-docking
B.18 months since last dry-docking
C.24 months since last dry-docking
D.36 months since last dry-docking

3.單項(xiàng)選擇題If the meter needle of the oxygen indicator cannot be set to zero，what should be done? （）

A.Replace the batteries
B.Check the sampling tube for blockage
C.Adjust the final reading by the amount the needle is displaced from zero
D.Replace the platinum filament

5.單項(xiàng)選擇題I am（）fire and have dangerous cargo on board.

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