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Railways NTPC (Technical Ability) Thermodynamics Question Bank Thermodynamics

  • question_answer
    Total enthalpy of steam at the inlet of a nozzle is 2800 kJ while static enthalpy at the exit is 2555 kJ. What is the steam velocity at the exit if expansion is isentropic?

    A) 70 m/s              

    B) 245 m/s

    C) 450 m/s            

    D) 700 m/s

    Correct Answer: D

    Solution :

    \[v=\sqrt{2\left( 2800-2555 \right)\times {{10}^{3}}}\]\[=\,\,700\,\,\text{m/s}\]


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