Railways Technical Ability Turbomachinery Question Bank Turbomachinery

  • question_answer            In a gas turbine cycle, the turbine output is 600 kJ/kg, the compressor work is 400 kJ/kg and the heat supplied is 1000 k/kg. The thermal efficiency of this cycle is:                                 

    A) 80%                             

    B) 60%        

    C) 40%                             

    D) 20%         

    Correct Answer: D

    Solution :

    \[{{\eta }_{th}}=\frac{{{w}_{t}}-{{w}_{c}}}{{{q}_{s}}}=\frac{600-400}{1000}=\frac{200}{1000}=0.2\,\,or\,\,20%\]

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