Railways Technical Ability Fluid Mechanics and Machinery Question Bank Fluid Mechanics

  • question_answer Which one of the following correctly represents the shear stress distribution across a section of a circular pipe having a viscous flow?

    A) \[\tau =\frac{\partial p{{r}^{2}}}{\partial x}\]               

    B) \[\tau =\frac{\partial p\left( r/2 \right)}{\partial x}\]

    C) \[\tau =-\,\,\frac{\partial p\left( r/2 \right)}{\partial x}\]       

    D) \[\tau =\frac{\partial p\left( r \right)}{\partial x}\]

    Correct Answer: C


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