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8th Class Science Combustion and Flame Question Bank Combustion and Flame

  • question_answer
    Calorific values of some fuels are given:
    Fuel Calorific value (kJ/kg)
    Coal 25000-33000
    Diesel 45000
    LPG 55000
    CNG 50000
    On the basis of this data, find out the correct order of efficiency of fuels.

    A)  LPG > CNG > Diesel > Coal

    B)  Coal > Diesel > LPG > CNG

    C)  Diesel > CNG > Coal > LPG

    D)  CNG > LPG > Diesel > Coal

    Correct Answer: A

    Solution :

    Higher the calorific value, higher is the fuel efficiency.


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