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Railways NTPC (Technical Ability) Turbomachinery Question Bank Turbomachinery

  • question_answer
    A 3 - stage reciprocating compressor has suction pressure of 1 bar delivery pressure of 27 bar. For minimum work of compression, the delivery pressure of 1st stage is:

    A) 14 bar              

    B) 9 bar

    C) 5.196 bar                      

    D) 3 bar

    Correct Answer: D

    Solution :

    \[{{p}_{2}}={{({{p}_{1}}{{p}_{3}})}^{1/3}}-{{(27\times 1)}^{1/3}}-3\,\,bar\]


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