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Railways NTPC (Technical Ability) Turbomachinery Question Bank Turbomachinery

  • question_answer
    In a fully trubulent flow through a rough pipe, the friction factor \['f'\] is (Re is the Reynolds number and \[{{\xi }_{s}}/D\] is relative roughness):              

    A) A function of Re

    B) A function of Re and \[{{\xi }_{s}}/D\]

    C) A function of \[{{\xi }_{s}}/D\]

    D) Independent of Re and \[{{\xi }_{s}}/D\]

    Correct Answer: B

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