Sewage Treatment Plant objective questions and answers


11. In preliminary treatment of sewage the operation which takes place, is


   A.Removal of fine suspended particlkes

   B.Removal of fine dissolved organic material

   C.Rmovalof harmful bacvterias and other organisms

   D.Removal of lighter floating material


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D. Removal of lighter floating material

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12. The sewage is treated by aerobicbacteria action in


   A.Setting tank

   B.Trickling filter

   C.Oxidation pond

   D.All of the above


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C. Oxidation pond

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13. The secodary traetment of sewage is carried out by the use of


   A.Screens

   B.Grit chambers

   C.Trickling filters

   D.Chlorinators


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C. Trickling filters

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14. The ratio of volume of recirculated sewage to volume of the raw seawge is called


   A.Recircultion ratio

   B.Reciculkation factor

   C.Recirculation coefficient

   D.None of the above


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A. Recircultion ratio

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15. The sewage means


   A.Waste organic products

   B.Waste inorganic products

   C.Waste water

   D.Mixture of water and waste products


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D. Mixture of water and waste products

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