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Railways NTPC (Technical Ability) Thermodynamics Question Bank Thermodynamics

  • question_answer
    The volumetric air content of a tyre at \[27{}^\circ C\] and at 2 bar is 30 litres. If one morning the temperature dips \[-\,\,3{}^\circ C,\] then the air pressure in the tyre would be:

    A) 1.8 bar

    B) 11 bar

    C) 0.8 bar 

    D) The same as at \[27{}^\circ C\]

    Correct Answer: A

    Solution :

    \[{{p}_{2}}=\frac{{{p}_{1}}{{T}_{2}}}{{{T}_{1}}}=\frac{2\times 270}{300}=1.8\,\,bar\]


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