单项选择题

Where should the tops of vents from gasoline tanks terminate?（）.

A.In open air
B.Inside cabins near the overhead
C.In the machinery space near the engine air intake
D.Underwater

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单项选择题

Where is thicker plating usually found in the construction of integral tanks on a ship? （）

A.On the outside of the tank
B.At the bottom of the tank
C.At the top of the tank
D.At the center of the tank

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When fueling has been completed（）.

A.the fuel tank fill pipe should be left open to allow vapors to vent from the tank
B.the engine should be started immediately to prevent vapor lock in the fuel line
C.all hatches should be opened and all compartments should be ventilated
D.open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment

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When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.

A.attempt to isolate the fire from the LPG
B.cool the bottles or remove them from the fire area
C.see that the valves on all LPG bottles are closed
D.place insulating material over the bottles