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

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

   A.Screening

   B.Skinning

   C.Filtration

   D.None of these

18. A well oxidized sewage contains nitrogen mainly as

   A.Nitrates

   B.Nitrites

   C.Free ammonia

   D.None of these

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

   A.Oxidation

   B.Filteration

   C.Burning

   D.Screening

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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