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Combustion And Flame

Question
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How does fire brigade work to extinguish fire ?

Solution

When fire brigade arrives, it pours water on the fire. Water cools the combustible material, so that its temperature is brought below its ignition temperature. They cut-off electricity and remove the combustible material from surrounding. This prevents the fire from spreading. Water vapour also surrounds the combustible material, helping in the cutting off the supply of air. So the fire is extinguished.


Some More Questions From Combustion And Flame Chapter

List conditions under which combustion can take place.

Burning of wood and coal causes __________ of air.

A liquid fuel, used in homes is __________

Fuel must be heated to its __________ before it starts burning.

Fire produced by oil cannot be controlled by ___________ .

Explain how the use of CNG in automobiles has reduced pollution in our cities.

Compare LPG and wood as fuels.

Give reasons :

Water is not used to control the fire involving electrical equipment.

Give reasons :

LPG is a better domestic fuel than wood.

Give reasons :

Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

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