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SSC JE Civil Engineering Preliminary Exam in January 2018 | Practice test Day – 40

Welcome to your SSC JE Civil Engineering 2018 Objective Exam Practice test Day - 40
Take an exciting test in SSC JE Civil Preliminary Exam in January 2018. 
You have only 20 mins to complete the test (25 Questions)
Wish you all the best!!!
1. In septic tanks, decomposition of organic bacteria, is done by
2. To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of
3. The standard B.O.D. of water is taken for
4. hydraulically equivalent, the relationship which holds good, is
5. In olden days the type of section adopted in trunk and out fall sewers was
6. In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of  concrete is kept
7. Removal of oil and grease from sewage, is known
8. The ratio of minimum hourly flow to the average flow of sewage is
9. If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is
10. Rate of flow of sewage is generally assumed
11. 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
12. Aerobic activity is maximum
13. Fresh sewage may become stale in
14. In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is
15. The sewer which transports the sewage to the point of treatment, is called
16. In sewage, the solids in mg per litre is
17. House connections to the laterals is generally made by
18. Drop manholes at the junctions of sewer lines, are provided if
19. Sewer pipes need be checked for
20. In 1000 kg of sewage, the total solids approximate
21. If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains
22. For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed
23. The small sewers are cleaned by
24. The coagulant widely used for sewage treatment, is
25. The sewerage system originates from

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