- A. Its intensity
- B. Its direction
- C. Its frequency
- D. All the above
Waste Water Engineering
-
The rainfall at any place may be determined by_____.
-
The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is_____.
- A. 1.5
- B. 2.0
- C. 3.0
- D. 4.0
-
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
-
If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is_____.
- A. 2 hours
- B. 3 hours
- C. 4 hours
- D. 5 hours
-
The most effective arrangement for diverting excess storm water into a natural drainage, is_____.
- A. Leaping weir
- B. Overflow weir
- C. Siphon spill way
- D. None of these
-
In detritus tanks_____.
- A. Flow velocity is kept 0.09 m/sec
- B. Detention period is kept 3 to 4 minutes
- C. Organic and inorganic materials are separated
- D. All the above
-
The clarigesters are_____.
- A. Circular septic tanks
- B. Rectangular septic tanks
- C. Circular Imhoff double tanks with bottom hoppers
- D. Circular Imhoff double storey tanks without bottom hoppers
-
Lead caulked joints are used for laying_____.
- A. Stone ware pipes
- B. Earthenware pipes
- C. C.I. pipes
- D. G.I. pipes
-
If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is_____.
- A. 2 hours
- B. 4 hours
- C. 6 hours
- D. 8 hours
-
At the junction of sewers_____.
- A. Top of smaller sewer is kept lower
- B. Top of larger sewer is kept lower
- C. Tops of both the sewers are at the same level
- D. None of these