PRINCIPLES OF PUTTING OUT A FIRE

PRINCIPLES OF PUTTING OUT A FIRE

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The principle of putting out a fire is to break the fire triangle by separating any of its vital constituents viz heat, fuel or Oxygen. This is done by

Removing heat or Cooling

Removing Fuel or Starvation

Removing Oxygen or Smothering

Removing heat or Cooling

Cooling by water is the most effective method of removing heat and best used on burning solids. This cooling is done by the use of extinguishers containing water  

Removing Fuel or Starvation

Extinguishing the fire by removing the burning fuel in the vicinity of fire is called Starvation method. In hut fire spreading of fire is chocked by removing the thatched roof. 

Removing Oxygen or Smothering

Dry powder, Carbon dioxide extinguishers work by smothering, by driving away Oxygen containing air from the vicinity of Fuel and replacing it with CO₂, dry powder or by vaporising liquids called halogens interfering with chemical reactions of the flame