TGPSC HMWSSB Manager 2015 Paper 2 · Question 72

Question 72 of the TSPSC Manager (Engineering), HMWSSB, 2015: Paper 2 (Civil Engineering) (1 November 2015). Try it first, then open the answer and explanation.

1. Manager 2015 Paper 2 (Civil) · Q72 · Fluid Mechanics & Hydraulics · Fluid Mechanics

   Ratio of the average velocity to maximum velocity for steady laminar flow in circular pipe is

   1. 1/2
   2. 2/3
   3. 3/2
   4. 2
   Show answer

   Answer: (1) 1/2

   For laminar (Hagen-Poiseuille) flow the velocity profile is parabolic, u = u_max(1 − r²/R²), whose mean over the circular section is u_max/2.

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