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                                                             CO2 is an excellent smothering agents for extinguishing fires.Its about 1.5 times heavier than air. It can easily be liquefied and bottled normally under pressure of approximately 150to 200 bars.                                                                  When used on fire the liquid CO2 gas taking away so...

Small fires in materiel such as textile etc.may be extinguishing by beating them out .Beating is also the method normally employed to extinguish crop and other similar fires in rural areas when water is readily not available.

                                                   Another method by which fire may be extinguished,especially for persons whose clothing is on fire,is by blanketing.The person should be lay down & covered or rolled in rug,coat, jacket,woolen blanket etc.Oil fires in puns and small utensils can be smothered with an asbestos blanket or similar materiel .                                                       Fire blankets are available in two specification such as light duty ...

                                The halogenated hydrocarbon used for extinguishing fires have the property of vaporizing readily when heated and are , there fore generally known as vaporizing liquids.They form a dense heavier than air ,cloud of non flammable vapor which use only blanket fire but also interferes with the chemical reaction of flame propagation in the burning materials .Vaporizing liquids are non conductors of electricity & does not damage electronic equipments.Their Great draw back is their toxicity.Some well known extinguishing media such as CTC & Methyl Bromide have been withdrawn from use due to their toxicity. Freon type vaporizing liquids are presently used as they are less toxic.The most common substance used are Bromochloro Difluro methane (BCF)Bromotri Fluro methane(BTM).     ...

Some burning materials such as metals  ,which cannot be extinguished by the use of water,may be dealt with by means of dry earth , dry sand ,powdered graphite, powdered talc , soda ash or lime stone all of which act as a smothering agent.Dry sand may also be used  to prevent burning liquids. Such as paints & oils , from flowing down drains ,basements etc.  *Sand should never be used for extinguishing fires in machinery  such as electronic motors.

Liquids having a specific gravity lower than that of water are much difficult for extinguishing with the use of water. When water is put to the burning surface of a liquid, it lower the temperature momentarily and then sinks below the surface of the liquid. Form is relatively insoluble in most liquids and because of its light weight , floats on the surface of the liquids. It forms a blankets capable of covering the surface of the burning liquid & so extinguish  the fire .It also forms a radiant heat barrier , which is of importance in extinguishing oil and petrol fires.

                                       Water is the cheapest and most readily available medium  for extinguishing fires of a general nature. If more water is used than what is actually required to contain and extinguish fire, the surplus will drain off or will sweep through floors & may cause more damage to goods and property than that caused by fire itself.  *The method of using water to extinguishing a fire various according to the size of the fire. * If  only a small quantity of water is required , portable extinguishers expelling water may be used. * If the fire is beyond the control of hard appliances ,hose reals may be used.  *For major fires when grater quantities of water are necessary ,high capacity pumbs may be employed. *A variation in the application of the w...