Railways Technical Ability Fluid Mechanics and Machinery Question Bank Fluid Mechanics

  • question_answer What is the discharge for laminar flow through a pipe of diameter 40 mm having centre line velocity of 1.5 m/s?

    A) \[\frac{3\pi }{59}\,{{\text{m}}^{\text{3}}}\text{/s}\]                

    B) \[\frac{3\pi }{2,500}\,{{\text{m}}^{\text{3}}}\text{/s}\]

    C) \[\frac{3\pi }{5000}\,{{\text{m}}^{\text{3}}}\text{/s}\]             

    D) \[\frac{3\pi }{10000}\,{{\text{m}}^{\text{3}}}\text{/s}\]

    Correct Answer: C

    Solution :

    \[Q={{A}_{v}}=\frac{\pi }{4}{{(0.04)}^{2}}\times 1.5=\frac{3\pi }{5000}\,{{\text{m}}^{\text{3}}}\text{/s}\]


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