A.smothering the burning material
B.chemical combination with burning material
C.absorbing the burning material
D.organic destruction of the burning material
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A.shutting off the air supply
B.cooling the fuel to below ignition temperature
C.dispersing the fuel
D.removing the source of ignition
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
A.contain flammable fumes
B.protect firefighters from flames
C.prevent flames from entering tanks
D.keep flames and sparks from getting out of an engine's exhaust system
A.the paint locker
B.spaces open to the atmosphere
C.cargo holds
D.the engine room
A.penetrates to the bottom of the fire
B.is kept saturated with low-velocity water fog
C.mixes with the burning fuel oil
D.completely covers the top of the burning liquid
最新試題
Halon extinguishers used on a class C fire should be directed at the（）.
Flames from small leaks of LFG may be extinguished by（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Fusible-link fire dampers are operated by（）.
Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
Flame screens are used to（）.
Halon extinguishes fire primarily by（）.
Control valves of a CO2 system may be located within the protected space when（）.
Foam extinguishes a fire by（）.
Halon extinguishes a fire by（）.