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LIST FOUR CHARACTERISTICS OF A GOOD SOURCE OF ENERGY AND MENTION ANY FOUR QUALITIES OF A GOOD FUEL.

  The different characteristics of  source of energy are :         
     i) It should be capable of providing an adequate amount of useful or net energy.
               ii) It should be convenient to use
              iii) Its transportation should be easy
              iv)  Its storage should be easy
               v)  It should be capable of delivering desired quantity of energy at a steady rate                         over a long period of time.

      A good fuel has the following characteristics:

            i) It should have high calorific value.
           ii) It should have normal ignition temperature.
           iii) It should not leave more  ash and should not produce hamful gases on burning
           iv) It should be economical and easy to handle.


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