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  • question_answer
    If the enthalpies at the entry and exit of a nozzle are 3450 kJ/kg and 2800 kJ/kg and the initial velocity is negligible, then the velocity at the exit is:

    A) 806.2 m/s                     

    B) 25.5 m/s

    C) 36 m/s              

    D) 1140.2 m/s

    Correct Answer: D

    Solution :

    \[{{v}_{e}}=\sqrt{2\,({{h}_{1}}-{{h}_{2}})}\]\[=\sqrt{2(3450-2800)\times {{10}^{3}}}=1140.2\,\,\text{m/s}\]


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