The characteristics of a good fuel are:

(i) It should be farily cheap.
(ii) It should be easily available.
(iii) Its ignition temperature should be well above normal temperature.
(iv) It should be conveniently handled and transported.
(v) It should not produce, during burning, any poisonous materials or irritating fumes.
(vi) Its combustion rate should be steady and controllable.
(vii) It should not leave any residue or ash after burning.