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

Related Mcqs:

1. 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...

2. 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...

3. 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...

4. 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...

5. 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...

6. 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...

7. For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is________________?

   A. 10 cm B. 12 cm C. 15 cm D. 18 cm...

8. If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is__________________?

   A. 1.39 m B. 1.49 m C. 1.59 m D. 1.69 m...

9. The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be__________________?

   A. 0.9 cm B. 1.2 m C. 1.5 m D. > 1.5 m...

10. To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is_________________?

    A. 0.50 m/sec B. 0.60 m/sec C. 0.70 m/sec D. 0.75 m/sec...