For large sewers, maximum distance between manholes may be_______________?

Related Mcqs:

1. 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

2. Large diameter sewers subjected to external pressure alone, are reinforced ______________________?

   A. Near the inner surface of the pipe
   B. Near the outer surface of the pipe
   C. Both A. and B.
   D. With elliptical cage

3. Sewer manholes are generally provided at________________?

   A. The change of gradient
   B. The change of direction
   C. The junctions of sewers
   D. All of these

4. Drop manholes at the junctions of sewer lines, are provided if________________?

   A. Invert level of a branch sewer is more than 60 cm that of the main sewer
   B. Sewer line runs along a main road
   C. Ordinary manhole cannot be built
   D. Two sewer lines intersect

5. Drop manholes are the manholes___________________?

   A. Without entry ladders
   B. Without manhole covers
   C. With depths more than 3.5 m
   D. Having drains at different levels

6. The maximum diameter of sewers adopted in the designs is_______________?

   A. 1.0 m
   B. 2.0 m
   C. 3.0 m
   D. 4.0 m

7. For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed________________?

   A. 1.5
   B. 2.0
   C. 2.5
   D. 3.0

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

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

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

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

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