A.solid materials such as wood or bales of fiber
B.inflammable liquids
C.electrical equipment
D.metallic solids
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A.it provides cooling as a secondary effect
B.works well on extinguishing electrical fires
C.can be used to combat combustible metal fires
D.All of the above
A.cooling
B.chemical action
C.smothering
D.inerting the air
A.smothering the burning material
B.chemical combination with burning material
C.absorbing the burning material
D.organic destruction of the burning material
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
最新試題
Fire extinguishing agents used on Class C fires must be（）.
Foam extinguishes a fire by（）.
Flames from small leaks of LFG may be extinguished by（）.
Fire hose couplings（）.
Halon from extinguishers used on a class B fire，should be directed（）.
Halon fire extinguishers are NOT effective when used on which types of fires?（）
CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
Firefighting foam is only effective when the foam（）.
Fire fighting equipment requirements for a particular vessel may be found on the（）.
Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.