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

  • question_answer
    The given table lists some of the fuels along with their calorific values and ignition temperatures.
    Fuel Calorific value (KJ/g) Ignition temperature\[{{(}^{o}}c)\]
    P 100 5
    Q 80 50
    R 30 60
    S 20 70
    Which of the following faels is an ideal fuel?

    A)  P                                           

    B)  Q   

    C)  R                                           

    D)  S

    Correct Answer: B

    Solution :

      There are several factors which are considered while choosing a fuel. A good fuel should have high calorific value and a low ignition temperature. However, the ignition temperature must not be lower than room temperature (so that it does not catch fire at room temperature). Fuel Q is adequate because it has high calorific value and low ignition temperature. The correct answer is B.           


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