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The oil fires should not be sprayed with...

The oil fires should not be sprayed with water. Why?

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VGS PUBLICATION-BRILLIANT-COMBUSTION , FUELS AND FLAME-EXERCISE
  1. Give four examples of combustible materials

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  2. Why should not we store spirit or petrol near our living place?

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  3. The oil fires should not be sprayed with water. Why?

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  4. Water is not used to control fires involving electrical equipment.Why?

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  5. What precautions are to be taken while pouring water on fire?

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  6. Give an example of a good fuel. How do you choose that fuel? Explain.

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  7. It is difficult to burn a heap of green leaves but not a heap of dry l...

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  8. Where do you find spontaneous combustion and rapid combustion in your ...

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  9. Why do we keep phosphorus in water?

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  10. How do you feel about "Fuels have become a part of human life"?

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  11. Is there any other procedure to prove that oxygen is needed for burnin...

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  12. The gas needed for combustion among the following is

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  13. The lowest temperature at which a substance catches fire is called its

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  14. The unit of calorific value

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  15. Spirit and petroleum turns into gas at

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  16. The type of combustion in which material suddenly burns into flames wi...

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  17. Why does candle give flame when it is burnt but why does coal burn wit...

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  18. Do all fuels produce same amount of heat when they are burnt?

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  19. What do we need to burn a material?

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  20. Have you observed material used to make school bell or bells in temple...

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