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Railways NTPC (Technical Ability) Fluid Mechanics and Machinery Question Bank Fluid Mechanics

  • question_answer
    The terminal velocity of small sphere falling in a viscous fluid is:

    A) Proportional to the diameter of the sphere

    B) Inversely proportional to the viscosity of the fluid

    C) Inversely proportional to the diameter of the sphere

    D) Proportional to the density of the fluid.

    Correct Answer: B

    Solution :

    Terminal velocity of a small sphere falling in a viscous fluid, \[v=\frac{{{d}_{2}}({{y}_{s}}-{{y}_{f}})}{18\mu }\]


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