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







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