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JCECE Engineering JCECE Engineering Solved Paper-2009

  • question_answer
    A Carnot engine takes heat from a reservoir at \[{{627}^{o}}C\] and rejects heat to a sink at\[{{27}^{o}}C\]. Its efficiency will be

    A) \[3/5\]                                 

    B) \[1/3\]

    C) \[2/3\]                                 

    D) \[200/209\]

    Correct Answer: C

    Solution :

    \[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}\] \[\therefore \]  \[\eta =1-\frac{(27+273)}{(273+627)}\]                     \[=1-\frac{300}{900}=\frac{600}{900}=\frac{2}{3}\]


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