Fine grit present in sewage is removed in the _____________ during sewage treatment?

Related Mcqs:

1. ____________ substances present in sewage are removed in grit chamber during sewage treatment?

   A. Organic
   B. Fatty
   C. Inorganic
   D. Dissolved

2. During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?

   A. Filtration
   B. Digestion
   C. Sedimentation
   D. Both B. and C.

3. In large thermal power stations very fine particulates present in flue gas are removed by___________________?

   A. Wet scrubber
   B. Bag filter
   C. Electrostatic precipitators
   D. Dust catcher

4. The type of bacteria which is active in trickling filter during biological treatment of sewage is the _____________ bacteria?

   A. Anaerobic
   B. Saprophytic
   C. Aerobic
   D. Parasitic

5. The main type of sludge gas evolved during sewage treatment in Imhoff tank is___________________?

   A. CO2
   B. CH4
   C. CO
   D. H2

6. The function of skimming tank in sewage treatment is to remove _____________ substances?

   A. Dissolved solid
   B. Suspended solid
   C. Oil & fatty
   D. Gritty & inorganic

7. In sewage treatment, the detention period allowed for oxidation ponds ranges from _____________ weeks?

   A. 1 to 2
   B. 4 to 5
   C. 9 to 10
   D. 15 to 20

8. Which of the following processes is involved in the biochemical treatment of sewage effluents ?

   A. Oxidation
   B. Reduction
   C. Dehydration
   D. Fermentation

9. In sewage treatment, its sedimentation is speeded up by commonly adding__________________?

   A. Hydrochloric acid
   B. Lime
   C. Copper sulphate
   D. Sodium sulphate

10. Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?

    A. Biological oxygen pond
    B. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
    C. Lagoons
    D. Filtration