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







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