Water Supply Engineering - Water Supply Engineering objective questions and answers


26.  Excessive aeration for water treatment may result into


   A. nothing

   B. Better quality of water

   C. Corrosion of metal

   D. Excessive ductility


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C. Corrosion of metal

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27.  Which of the following is the first stage in the treatment of water?


   A. Filteration

   B. Coagulation

   C. Mixing

   D. Sedimentation


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D. Sedimentation

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28.  The colour of water measured on


   A. Turbidity scale

   B. Platinum hardness scale

   C. Calcium hardness

   D. Threshold scale


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B. Platinum hardness scale

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29.  Taste and colour of Water is due to


   A. Manganese

   B. Iron oxide

   C. Calcium

   D. All of the above


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D. All of the above

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30.  Presence of lead in water


   A. Changes its colour

   B. Causes turbidity

   C. Causes alkalinity

   D. None of the above


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D. None of the above

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