A. Branch sewers
B. Main sewers
C. Trunk sewers
D. All the above
Related Mcqs:
- The design period in years for pumping plants, is___________________?
A. 1
B. 2 to 3
C. 3 to 5
D. 5 to 10 - The design period of sewage treatment works in normally_________________?
A. 5 – 10 years
B. 15 – 20 years
C. 30 – 40 years
D. 40 – 50 years - ¾th or ¼th extra space is left in sewer pipes at maximum discharge for_________________?
A. Low estimates of the average and maximum flows
B. Large scale infiltration of storm water
C. Unexpected increase in population
D. All the above - The detention time (t) of a settling tank, may be defined as the time required for_________________?
A. A particle to travel along its length
B. A particle to travel from top surface to bottom sludge zone
C. The flow of sewage to fill the tank
D. None of these - Sewer pipes need be checked for_________________?
A. Minimum flow
B. Maximum flow
C. Both A. and B.
D. None of these - The standard B.O.D. of water is taken for_________________?
A. 1 day
B. 2 days
C. 3 days
D. 5 days - The grit and silt of the grit chambers, may not be used for_________________?
A. Raising low lying areas by dumping
B. Concreting
C. Both A. and B.
D. Neither A. nor B - General energy equation holds for_________________?
A. steady flow
B. turbulent flow
C. laminar flow
D. non-uniform flow
E. all of the above - Maximum permissible velocity 1.5 m/sec, is adopted in drains_______________________?
A. With beds of rocks and gravels
B. Lined with stones
C. Both A. and B.
D. Neither A. nor B. - In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is_______________?
A. Separate system
B. Combined system
C. Partially combined system
D. None of these
