Civil Engineering – Waste Water Engineering Mock test – 2

Welcome to your Waste Water Engineering Mock test -2
Take an exciting test in Waste Water Engineering 
You have only 20 mins to complete the test (31 Questions)
Wish you all the best!!!
1. 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
2. A drop manhole is provided if
3. Dry water flow in a combined sewer, is
4. The effluent of a septic tank is
5. In sewage having fully oxidised organic matter, the nitrogen exists in the form of
6. The digested sludge from septic tanks, is removed after a maximum period of
7. The effluent of a septic tank is
8. The liquid wastes from kitchens, bath rooms and wash basins, is not called
9. It is customary to design a sewer for D.W.F. on the basis of
10. The small sewers are cleaned by
11. The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is
12. The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known
13. The presence of free ammonia in sewage, is detected by
14. The standard B.O.D. of water is taken for
15. Maximum permissible velocity 1.5 m/sec, is adopted in drains
16. The detention period for plain sedimentation water tanks, is usually
17. The clarigesters are
18. In sewers the highest non-scouring velocity is achieved in
19. he most dangerous pollutant in vehicular emissions is
20. For providing an Indian type W.C., the R.C.C. slabs in the toilet portion
21. Pick up the correct statement from the following :
22. Fresh sewage may become stale in
23. During preliminary treatment of a sewage
24. Nitrogen cycle of sewage, is
25. The drop man holes are generally provided in sewers for
26. If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is
27. For design purposes, the normal rate of infiltration of ground water into the sewer, is
28. In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is
29. Rate of flow of sewage is generally assumed
30. Pick up the correct statement from the following :
31. A manhole is classified as shallow if its depth is between

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