Fire is a chemical reaction accompanied by the evolution of light an heat with oxygen and burnable materials. Chemically it is termed as oxidation.
CLASSIFICATIONS OF FIRE
Combustible materials (wood, paper, fabric, refuse)
Flammable metals or combustible metals
Cooking oils and fats
Now that you have an idea of the classes of fire, you will now be able to identify the appropriate fire extinguisher that you can utilize to put off the fire. This is the reason why you see these symbols on a standard extinguisher.
If the extinguisher contains the following label, the you can use them for class a, b, and c fires.
If such labels indicate a red slanting bar, then it is not suitable for such kind of fire.