Extinguishing a Fire
Extinguishing a Fire
Fire can be controlled by removing any one or more of these conditions. A fire extinguisher cuts off the supply of air or brings down the temperature of the fuel or both and controls the fire.
Fire can be controlled and extinguished by :-
1. Removing any combustible materials near the region of fire.
2. Cutting off the supply of air by using sand or blanket.
3. Bringing down the ignition temperature by using water.
Fuel in most cases cannot be eliminated. If for instance, a building catches fire, then the whole building is the fuel.
Fire can be extinguished using water :-
Water evaporates, taking away heat from the fire, which in turn cools down the burning materials below its ignition temperature. However, water is dangerous in most of the cases:
Carbon dioxide fire extinguisher consist of carbon dioxide filled under high pressure in cylinders. It is not a supporter of combustion .Being heavier than air; carbon dioxide settles down and cut off the supply of oxygen which extinguishes the fire.
When released from cylinders, expands enormously in volume and cools down. So, it not only forms a blanket around the fire, it also brings down the temperature of the fuel.
Soda Acid Fire Extinguisher : It contain concentrated solution of sodium hydrogen carbonate and sulphuric acid and in separate compartments.
Which of the following is best explanation of statement: "Water should never be used to extinguish oil fires". | |||
| Right Option : B | |||
| View Explanation |
In soda - acid extinguisher, the bottle contains ______________ | |||
| Right Option : A | |||
| View Explanation | |||
When water is poured over burning wood, the fire goes off. This is because ___________________________ | |||
| Right Option : A | |||
| View Explanation | |||
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