In sewers designed with self cleansing velocity________________?

Related Mcqs:

1. Self-cleansing velocity is__________________?

   A. Velocity at dry weather flow B. Velocity of water at flushing C. Velocity at which no accumulation remains in the drains D. Velocity of water in a pressure filter...

2. The self-cleansing velocity of water flowing through pipe lines, is___________________ ?

   A. 2 metres/sec B. 1 metre/sec C. 0.5 metre/sec D. 0.25 metre/sec...

3. With self cleansing velocity in sewers___________________?

   A. Silting occurs at bottom B. Scouring occurs at bottom C. Both silting and scouring occur at bottom D. Neither silting nor scouring occurs at bottom...

4. If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is__________________?

   A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...

5. If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is___________________?

   A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...

6. Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer?

   A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not a correct explanation of A C. A is true but R is false D. A is false but R is true...

7. If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________?

   A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...

8. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?

   A. 0.05552 cumec B. 0.05554 cumec C. 0.05556 cumec D. 0.0556 cumec...

9. The suitable cross-section of sewers to carry combined flow, is__________________?

   A. Circular B. Egg shaped C. Rectangular D. Horse shoe shaped...

10. The most efficient cross-section of sewers in a combined sewerage system is________________?

    A. Parabolic B. Circular C. Rectangular D. New egged...