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Railways NTPC (Technical Ability) Instrument Mechanical Question Bank Instrument Mechanical

  • question_answer
    A centrifugal pump was manufactured to couple directly to a 15 HP. electric motor running at 1950 rpm delivering 50 liters per minute against a total head of 20 m. It is desired to replace the pump. The head developed by pump is likely to be:

    A) 41.4 m             

    B) 29.6 m

    C) 20 m                            

    D) 9.5 m

    Correct Answer: C

    Solution :

    N = 1950 rpm, Q = 50 1 pm or \[50\times {{10}^{-\,3}}{{m}^{3}}/min,\] H = 20 m


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