题目
CO2 extinguishes a fire by
A.a blanket of bubbles formed on the
B.smothering
C.cooling
D.isolating the heat from the fuel
第1题
CO2 extinguishes a fire by __________.
A.a blanket of bubbles formed on the surface of the fire
B.smothering
C.isolating the heat from the fuel
D.cooling
第2题
Halon extinguishes a fire by ______.
A.breaking the chain reaction
B.smothering the fire
C.cooling the fire
D.coating the fuel with a nonflammable surface
第3题
Foam extinguishes a fire by ______.
A.shutting off the air supply
B.cooling the fuel to below ignition temperature
C.dispersing the fuel
D.removing the source of ignition
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