单项选择题
A.soda acid B.foam C.CO2 D.sand
Fires in escaping flammable gas are quickly brought und...
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
If a fire occurs in the boiler room because of a leakin...
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
Spontaneous combustion could occur in（）A.paint thinner ...
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
