A.Fires in electrical equipment B.Flammable oils and greases C.Class A fires in ordinary combustibles D.Materials containing their own oxygen
A.Point the horn down B.Turn cylinder upside-down C.Break the rupture disc D.Pull pin，squeeze grip
A.By cooling the oil below the ignition temperature B.By removing the fuel source from the fire C.By excluding the oxygen from the fire D.By increasing the weight of the oil
A.used for electrical fires only B.the smallest C.the most accessible D.the most effective
A.cooling B.chemical action C.smothering D.inerting the air
