Clogging of sewers, is caused due to_______________?

Related Mcqs:

1. Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is ?

   A. Centrifugal pump B. Pneumatic ejector C. Reciprocating pump D. None of these...

2. Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is__________________?

   A. pt = 3H3p/2 Z5 B. pt = 2H3p/3 Z5 C. pt = 3H3p/2Z5 D. pt = 2 3p/3Z5...

3. In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

   A. 100 mm dia. B. 150 mm dia. C. 225 mm dia. D. All of these...

4. For sewers, inverted siphon is provided for___________________?

   A. One pipe B. Two pipes C. Three pipes D. Four pipes...

5. The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is____________________?

   A. 20 m B. 30 m C. 45 m D. 75 m...

6. The laying of sewers is done with____________________?

   A. Magnetic compass B. Theodolite C. Level D. Clinometer...

7. The minimum recommended diameter of sewers, is_________________?

   A. 5 cm B. 10 cm C. 15 cm D. 20 cm...

8. 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...

9. For design of sewers, percentage of sewage discharge is assumed_____________________?

   A. 65 to 70% B. 70 to 75% C. 75 to 80% D. 85%...

10. The gas which may cause explosion in sewers, is_________________?

    A. Carbondioxide B. Methane C. Ammonia D. Carbon monoxide...