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8th Class Science Combustion and Flame Question Bank Combustion and Flame Conceptive Objective Problems

  • question_answer
     The calorific value of a fuel is 330000 kJ/kg. 0.9634 kg of the fuel is taken for combustion. The total amount of heat energy (in kJ) produced during combustion is

    A)  317922           

    B)  215677

    C)  3179.22               

    D)  317.922

    Correct Answer: A

    Solution :

      Calorific value of a fuel is the amount of heat produced when 1 kg of that fuel undergoes complete combustion. Calorific value = 330000 kJ/kg (given) i.e., 1 kg of fuel on complete combustion produces 330000 kJ of heat Hence, the amount of heat energy produced by the combustion of 0.9634 kg of fuel \[=330000\times 0.9634\text{ }kJ=317922\text{ }kJ\] The correct answer is A.               


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