Water Supply Engineering - Water Supply Engineering objective questions and answers

21.  Reverse osmonics process is used for

   A. Desalinization

   B. Fluoridation

   C. Distillation

   D. Freezing

22.  The starch iodide test is performed to test

   A. Residual bromine

   B. Residual iodine

   C. Residual chlorine

   D. Residual CO₂

23.  Field of a well is

   A. The maximum amount of water available

   B. Water available continuously for one hour

   C. Water that can be drawn in 24 hours

   D. The maximum quantity of water that can be continuously drawn with fixed depression

24.  Potassium permanganate is used for

   A. Reducing hardness

   B. Reducing acidity

   C. Improving colour

   D. De-chlorination

25.  Air binding in rapid sand filters is caused due to

   A. High Pressure

   B. Atmospheric pressure

   C. Negative pressure

   D. Excessive turbidity

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