TGPSC HMWSSB Manager 2015 Paper 2 · Question 56

Question 56 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) · Q56 · Water Resources & Irrigation · Hydrology

   If S_y = specific yield and S_r = specific retention then

   1. S_y + S_r = void ratio
   2. S_y + S_r = porosity
   3. S_y + S_r = 1.0
   4. S_y + S_r = permeability
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   Answer: (2) S_y + S_r = porosity

   Of the total pore volume, the part that drains by gravity is the specific yield and the part held back against gravity is the specific retention, so S_y + S_r = porosity (n), not void ratio.

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