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

Related Mcqs:

1. 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...

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

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

3. The recommended detention period for grit chambers is_______________?

   A. 1 minute B. 2 minutes C. 3 minutes D. 5 minutes...

4. In a grit chamber of a sewage treatment plant ____________________?

   A. Flow velocity 0.15 m to 0.3 m/sec is kept B. Depth of 0.9 m to 1.20 m is kept C. One minute of detention period is kept D. All the above...

5. 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...

6. The detention time (t) of a settling tank, may be defined as the time required for_________________?

   A. A particle to travel along its length B. A particle to travel from top surface to bottom sludge zone C. The flow of sewage to fill the tank D. None of these...

7. ¾th or ¼th extra space is left in sewer pipes at maximum discharge for_________________?

   A. Low estimates of the average and maximum flows B. Large scale infiltration of storm water C. Unexpected increase in population D. All the above...

8. Design period of 40 to 50 years is adopted for_________________?

   A. Branch sewers B. Main sewers C. Trunk sewers D. All the above...

9. Sewer pipes need be checked for_________________?

   A. Minimum flow B. Maximum flow C. Both A. and B. D. None of these...

10. The standard B.O.D. of water is taken for_________________?

    A. 1 day B. 2 days C. 3 days D. 5 days...