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
Fire may be spread by which means?（）.
CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
Fire extinguishing agents used on Class C fires must be（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Halon extinguishes a fire by（）.
Halon extinguishers used on a class C fire should be directed at the（）.
Foam extinguishes a fire by（）.
Fire alarm system thermostats are actuated by（）.
Halon fire extinguishers are NOT effective when used on which types of fires?（）
Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.