The self cleansing velocity for all sewers in India is usually_________________?

Related Mcqs:

1. The effect of increasing diameter of sewer on the self cleansing velocity is_____________?

   A. to decrease it B. to increase it C. fluctuating D. nil...

2. Which of the following sewers is preferred for combined system of sewage ?

   A. circular sewer B. egg shaped sewer C. rectangular sewer D. none of the above...

3. The minimum and maximum diameters of sewers shall preferably be_________________?

   A. 15 cm and 100 cm B. 15 cm and 300 cm C. 30 cm and 450 cm D. 60 cm and 300cm...

4. Laying of sewers is usually done with the help of________________?

   A. a theodolite B. a compass C. sight rails and boning rods D. a plane table...

5. Corrosion in concrete sewers is caused by______________?

   A. septic conditions B. dissolved oxygen C. chlorine D. nitrogen...

6. The main disadvantage of cement concrete sewers is________________?

   A. less strength B. difficulty in construction C. difficulty in transportation due to heavy weight D. less life...

7. A sewer that receives the discharge of a number of house sewers is called________________?

   A. house sewer B. lateral sewer C. intercepting sewer D. submain sewer...

8. Which of the following retards the self purification of stream ?

   A. higher temperature B. sunlight C. satisfying oxygen demand D. none of the above...

9. The velocity of flow does not depend on_______________?

   A. grade of sewer B. length of sewer C. hydraulic mean depth of sewer D. roughness of sewer...

10. The velocity of flow of water in a sedimentation tank is about__________________?

    A. 5 to 10 cm/sec. B. 15 to 30 cm/sec. C. 15 to 30 cm/minute D. 15 to 30 cm/hour...