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
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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
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
最新試題
Fire hose couplings（）.
Control valves of a CO2 system may be located within the protected space when（）.
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.
Foam extinguishes a fire by（）.
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（）.
CO2 cylinders，which protect the small space in which they are stored must（）.
Good housekeeping on a vessel prevents fires by（）.
Fire may be spread by which means?（）.
Fire fighting equipment requirements for a particular vessel may be found on the（）.