Cooling, Starvation, Smothering, Chain breaking mechanism With Water Merits And Demerits full explained (chapter-2 Unit-1)
Fire Extinguishing Modes Fire can be extinguished by employing one or more of the following techniques. Cooling:- This means removal of heat this can be achieved by the use of water. Generally 'A' class fire can be extinguished by this method. Starvation:- Removal of fuel. this can be achieved by cutting out the fuel supply to the fire. This can be achieved by physical removal of fuel e.g. pumping out the fuel from the tank on fire or isolating the supply valve etc. Smothering:- Removal of oxygen (air) or diluting the same to blow the minimum requirement. This can be achieved by by applying an inert gas such as CO2 or nitrogen or dry chemical powder or halons etc. Chain breaking mechanism: - This can be achieved by the application of halogenated hydrocarbons or dry chemical powder which distribute the chain reaction between free free radicals of fuel and atmospheric air.