With self cleansing velocity in sewers___________________?

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. 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...

4. 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...

5. 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...

6. 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...

7. In sewers designed with self cleansing velocity________________?

   A. The bottom is silted B. The bottom is scoured C. Both silting and scouring occur at the bottom D. Neither silting nor scouring occurs at the bottom...

8. The sewers___________________?

   A. Must be of adequate size to avoid over flow B. Must flow under gravity ½ to ¾ full C. Must be laid at least 2 to 3 m deep to collect /water from the basements D. All the above...

9. At the junction of sewers___________________?

   A. Top of smaller sewer is kept lower B. Top of larger sewer is kept lower C. Tops of both the sewers are at the same level D. None of these...

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...