Describe fire extinguishing method.
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(i) Carbon Dioxide Extinguishing Systems 

This type is the most suitable & widely recommended one for electrical fires. Carbon dioxide (CO2) extinguishers are normally Class C extinguishers. Before using, Switch off the supply immediately so that the source for the fire to get sustained is isolated using proper insulated hand gear/foot gear . To use the extinguisher, pull the pin near the handle, point the horn at the base of the fire, and hold down the handle. As the flames shrink, continue spraying until the fire is fully extinguished. 


(ii) Dry chemical extinguisher 

The Dry Powder (or Dry Chemical) charged fire extinguisher is a multipurpose fire extinguisher and can be used on wide variety of fires. They are used on electrical fires but leave a residue that may be harmful to sensitive electronics. They work by chemical reaction with the fire causing the particles to expand chemically inhibiting combustion and expelling the oxygen thereby smothering the flames.

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