Sewage Treatment Plant objective questions and answers


16. The ratio of minmum hourly flow to the average flow of sewage is


   A.1/4

   B.1/3

   C.1/2

   D.3/4


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B. 1/3

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17. Removal of oil and grease from sewage, is known


   A.Screening

   B.Skinning

   C.Filtration

   D.None of these


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B. Skinning

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18. A well oxidized sewage contains nitrogen mainly as


   A.Nitrates

   B.Nitrites

   C.Free ammonia

   D.None of these


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A. Nitrates

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19. In sewage treatmentplants, the bulky floating and suspended matter is removed by


   A.Oxidation

   B.Filteration

   C.Burning

   D.Screening


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D. Screening

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20. The pumping of sewage is necessary from


   A.Low lying areas of a city

   B.Basements

   C.Flat areas

   D.All of the above


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D. All of the above

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