A large oil fire is best extinguished with（）

单项选择题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

单项选择题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

单项选择题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

单项选择题All classes of fires can be safely combated using（）

A.foam
B.CO₂
C.low velocity water fog
D.high velocity water fog

单项选择题If there were a fire in the bunker tanks, you would（）

A.close the vent
B.pump out the tank
C.activate the fixed CO₂ system
D.cut off the heating coils