AIR, COMBUSTION, RUSTING AND FIRE FIGHTING.

 AIR, COMBUSTION, RUSTING AND FIRE FIGHTING.

1.(a) Define the following terms:-

    i)Air    

   ii) Combustion

  iii) Rusting 

  iv) Fire fighting

      

b) Give out percentage approximated of volume of gases present in air.

Name of the Gas                                        Approximated in percentage

Nitrogen………………………………………………X

Oxygen………………………………………………..Y

Carbon IV oxide………………………………………Z

Noble Gas……………………………………………..W

Dust…………………………………………………...U

Water Vapour………………………………...……….V

2. A piece of burning Sulphur in a deflagrating snood is lowed into a gas jar of Oxygen.

   a) State the Observation made.

   b) What name is given to the reaction that takes place?

3. a) What do you understanding by:-

   i. Rusting        

  ii. Fire fighting

  b) What are the necessary conditions for rusting to occur?

4. a) Mention four way on which rusting may be prevented.

    b) State three disadvantage of Rusting.

5. Give the different between Burning and Rusting.

6. a) Give two similarities between Burning and Rusting.

    b) Explain how oil prevents rusting.

7. a) Define Fire.

    b) Explain briefly the five classes of fire.

8. a) Give differences between fire fighting and fire extinguishers.

    b) Mention the (3) three components required for a fire to occur.

9. Write short notes on the four types of fire extinguisher.

10. a) What is the name given for a substance that catch fire and burn easily.

     b) Is air mixture or compound? Explain.