Railways Technical Ability Turbomachinery Question Bank Turbomachinery

  • question_answer Given: \[{{\eta }_{s}}=\] Stage efficiency, \[{{\eta }_{n}}=\] Nozzle efficiency, \[{{\eta }_{s}}=\] Blade efficiency, Which one of the following is correct?

    A) \[{{\eta }_{n}}={{\eta }_{b}}={{\eta }_{s}}\]             

    B) \[{{\eta }_{b}}={{\eta }_{s}}{{\eta }_{n}}\]

    C) \[{{\eta }_{s}}\times {{\eta }_{n}}\times {{\eta }_{s}}=1\]        

    D) \[{{\eta }_{s}}={{\eta }_{s}}{{\eta }_{n}}\]

    Correct Answer: D


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