The laying of sewers is done with____________________?

Related Mcqs:

1. For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of___________________?

   A. 100 cm
   B. 120 cm
   C. 140 cm
   D. 160 cm

2. The asbestos cement sewers are_________________?

   A. Light in weight
   B. Not structurally strong to bear large compressive stress
   C. Susceptible to corrosion by sulphuric acid
   D. All the above

3. Setting out the alignments of sewers may start from__________________?

   A. City
   B. Out-fall
   C. Tail end
   D. Any point

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 gradient of sewers depends upon_________________?

   A. Velocity of flow
   B. Diameter of the sewer
   C. Discharge
   D. All the above

7. The most efficient cross section of sewers in a separate sewerage system is__________________?

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

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. 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

10. In sewers the velocity of flow should not be_________________?

    A. More than the self-cleansing velocity
    B. Less than the self-cleansing velocity
    C. Less than 10 m/sec
    D. More than 20 m/sec