Science

Combustion and Flame


How do We Control Fire?


You must have seen or heard of fire breaking out in homes, shops and factories. If you have seen such an accident, write a short description in your note book. Also, share the experience with your classmates.Does your city/town have a fire brigade station? When a fire brigade arrives, what does it do? It pours water on the fire . Water cools the combustible material so that its emperature is brought below its ignition temperature. This prevents the fire from spreading. Water vapours also surround the combustible material, helping in cutting off the supply of air. So. the fire is extinguished.You have leamt that there are three essential requirements for producing fire. Can you list these requirements? These are: fuel, air (to supply oxygen) and heat (to raise the temperature of the fuel beyond the ignition temperature). Fire can be controlled by removing one or more of these requirements. The job of a fire extinguisher is to cut off the supply of air. or to bring down the temperature of the fuel, or both. Notice that the fuel in most cases cannot be eliminated. If. for instance, a building catches fire, the whole building is the fuel.

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Notes


Combustion and Flame - Notes
1. What is a Fuel?
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2. Burning of Fuels Leads to Harmful Products.
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3. Types of Combustion
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4. Fuel Efficiency
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5. Flame
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6. What is Combustion?
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7. How do We Control Fire?
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