Railways Technical Ability Fluid Mechanics and Machinery Question Bank Fluid Mechanics

  • question_answer Fluid flow rate Q, can be measured easily with the help of a venturi tube, in which the difference of two pressures, \[\Delta \,P,\]  measured at an upstream point and at the smallest cross-section of the tube, is used. If a relation \[\Delta \,P\propto {{Q}^{n}}\] exists, then n is equal to:

    A) \[\frac{1}{3}\]                          

    B) \[\frac{1}{2}\]

    C) 1                                 

    D) 2

    Correct Answer: D

    Solution :

    \[Q\propto \sqrt{h}\,\,\,or\,\,\,h\propto {{Q}^{2}}\]

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