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 extinguishes fire primarily by（）.
Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.
Fire alarm system thermostats are actuated by（）.
Halon from extinguishers used on a class B fire，should be directed（）.
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.
Foam is a very effective smothering agent and（）.
How does foam extinguish an oil fire?（）.
Gas masks（）.
Firefighting foam is only effective when the foam（）.
Halon fire extinguishers are NOT effective when used on which types of fires?（）