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Waste water Engineering Mock test – 4 || Civil Engineering Mock tests




Welcome to your Waste water Engineering Mock test - 4
Take an exciting test in Waste water Engineering
You have only 20 mins to complete the test (25 Questions)
Wish you all the best!!!
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1. For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed
2. The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of  0.2 m/sec. If the ratio of width to depth is 2, the depth is
3. In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is
4. The coagulant widely used for sewage treatment, is
5. The standard B.O.D. of water is taken for
6. If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is
7. Aerobic activity is maximum
8. The small sewers are cleaned by
9. In septic tanks, decomposition of organic bacteria, is done by
10. In 1000 kg of sewage, the total solids approximate
11. If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains
12. The sewer which transports the sewage to the point of treatment, is called
13. Fresh sewage may become stale in
14. hydraulically equivalent, the relationship which holds good, is
15. In sewage, the solids in mg per litre is
16. Sewer pipes need be checked for
17. House connections to the laterals is generally made by
18. In olden days the type of section adopted in trunk and out fall sewers was
19. In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of  concrete is kept
20. To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of
21. Removal of oil and grease from sewage, is known
22. Rate of flow of sewage is generally assumed
23. Drop manholes at the junctions of sewer lines, are provided if
24. The sewerage system originates from
25. The ratio of minimum hourly flow to the average flow of sewage is







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