The minimum recommended diameter of sewers, is_________________?

Related Mcqs:

1. The minimum diameter of sewer to be adopted is_________________?

   A. 10 cm
   B. 12.5 cm
   C. 15 cm
   D. 25 cm

2. 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

3. 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

4. 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

5. 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

6. In sewers the gas generally found, is_________________?

   A. Hydrogen sulphide (H2S)
   B. Carbon dioxide (CO2)
   C. Methane (CH4)
   D. All the above

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

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

8. 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

9. The minimum diameter of a sewer is kept __________________?

   A. 10 cm
   B. 15 cm
   C. 20 cm
   D. 25 cm

10. If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is_______________?

    A. D’ = 0.64 D
    B. D’ = 0.74 D
    C. D’ = 0.84 D
    D. D’ = 0.94 D