In a grit chamber of a sewage treatment plant ____________________?

Related Mcqs:

1. The grit chambers of sewage treatment plants, are generally cleaned after__________________?

   A. 2 days B. 7 days C. 12 days D. 14 days...

2. If the grit in grit chambers is 4.5 million litres per day, its cleaning is done____________________?

   A. Manually B. Mechanically C. Hydraulically D. Electrically...

3. The grit and silt of the grit chambers, may not be used for_________________?

   A. Raising low lying areas by dumping B. Concreting C. Both A. and B. D. Neither A. nor B...

4. For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?

   A. 16 m B. 20 m C. 24 m D. 30 m...

5. The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is____________________?

   A. 100 cm B. 110 cm C. 120 cm D. 150 cm...

6. The spacing of bars for perforations in coarse screens used for the treatment of sewage, is ____________________?

   A. 20 mm B. 30 mm C. 40 mm D. 50 mm...

7. The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope_________________?

   A. 1 in 5 B. 1 in 10 C. 1 in 15 D. 1 in 20...

8. A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is_____________________?

   A. 2.30 m B. 2.40 m C. 2.45 m D. 2.50 m...

9. The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is___________________?

   A. 1.5 B. 2.0 C. 3.0 D. 4.0...

10. If q is the average sewage flow from a city of population P, the maximum sewage flow______________?

    A. Q = [(4 + )/(18 + )] q B. Q = [(18 + P)/(4 + )] q C. Q = [(18 + )/(4 + )] q D. Q = [(5 + )/((15 + )] q...