单项选择题
A.cooling B.chemical action C.smothering D.inerting the air
Foam extinguishes a fire by（）.A.smothering the burning ...
单项选择题Foam extinguishes a fire by（）.
A.smothering the burning material B.chemical combination with burning material C.absorbing the burning material D.organic destruction of the burning material
Foam extinguishes a fire by（）.A.shutting off the air su...
A.shutting off the air supply B.cooling the fuel to below ignition temperature C.dispersing the fuel D.removing the source of ignition
Flames from small leaks of LFG may be extinguished by（）...
单项选择题Flames from small leaks of LFG may be extinguished by（）.
A.utilizing carbon dioxide or dry chemical fire extinguishers B.utilizing soda and acid fire extinguishers C.blowing the flames out D.letting it burn itself out
