TGPSC HMWSSB Manager 2015 Paper 2 · Question 58

Question 58 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) · Q58 · Water Resources & Irrigation · Irrigation Engineering

   Which one of the following equations represents the downstream profile of Ogee spillway with vertical upstream face? (X, Y) are the coordinates of the point on the downstream profile with origin at the crest of the spillway and H_d is the design head.

   1. Y/H_d = -0.5(X/H_d)^1.85
   2. Y/H_d = -0.5(X/H_d)^(1/185)
   3. Y/H_d = -2.0(X/H_d)
   4. Y/H_d = -2.0(X/H_d)^(1/185)
   Show answer

   Answer: (1) Y/H_d = -0.5(X/H_d)^1.85

   The WES standard profile for a vertical upstream face is X^1.85 = 2.0 H_d^0.85 Y, i.e. Y/H_d = 0.5(X/H_d)^1.85, with the minus sign because Y is measured downward from the crest.

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