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Environmental Engineering - Interview Questions and Answers

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41. To divert excessive flow from combined sewers, the most commonly used weir is a
A. cipoletti weir
B. broadcrested weir
C. leaping weir
D. submerged weir
Explanation:
42. A pipe which is installed in the house drainage to preserve the water seal of traps is called
A. vent pipe
B. antisiphonage pipe
C. waste pipe
D. soil pipe
Explanation:
43. Composting and lagooning are the methods of
A. sludge digestion
B. sludge disposal
C. sedimentation
D. filtration
Explanation:
44. When there is no recirculation of sewage, then recirculation factor is
A. 0
B. 1
C. infinity
D. none of the above
Explanation:
45. In facultative stabilization pond, the sewage is treated by
A. aerobic bacteria only
B. algae only
C. dual action of aerobic bacteria and anaerobic bacteria
D. sedimentation
Explanation:
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