2. Questions Bank
  3. Railways
  4. NTPC (Technical Ability)
  5. Turbomachinery

Railways NTPC (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 :

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


You need to login to perform this action.
You will be redirected in 3 sec spinner