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單項選擇題

Fires in escaping flammable gas are quickly brought under control by（）

A.stopping the flow of gas
B.reducing the chemical chain reaction
C.increasing the oxygen supply
D.cooling below the autoignition point

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單項選擇題

If a fire occurs in the boiler room because of a leaking fuel line to a burner, you shut off the fuel using the（）

A.burner valve
B.root valve
C.quick closing valve
D.oil return valve

單項選擇題

Spontaneous combustion could occur in（）

A.paint thinner in an open can
B.fuel accumulation in the bilge
C.oily rags in an unvented compartment
D.gasoline stored in steel drums

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