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Environmental Engineering - Interview Questions and Answers

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26. Generally the detention period for grit chambers is kept as
A. 1 minute
B. 5 minutes
C. 2-4 hours
D. 12 hours
Explanation:
27. If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is
A. 1000
B. 4000
C. 100000
D. 400000
Explanation:
28. If the sewage contains grease and fatty oils, these are removed in
A. grit chambers
B. detritus tanks
C. skimming tanks
D. sedimentation tanks
Explanation:
29. Sewerage system is designed for
A. maximum flow only
B. minimum flow only
C. average flow only
D. maximum and minimum flow
Explanation:
30. The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called
A. waste pipe
B. soil pipe
C. vent pipe
D. antisiphonage pipe
Explanation:
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