Discussion
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- Question
The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. Chlorination of water is done for the removal of
Options- A. bacterias
- B. suspended solids
- C. sediments
- D. hardness. Discuss
- 2. The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is
Options- A. 0.68 m
- B. 0.88 m
- C. 1.36 m
- D. 1.76 m. Discuss
- 3. In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept
Options- A. 10.0
- B. 5.0
- C. 2.0
- D. 0.25 Discuss
- 4. A sewer pipe contains 1 mm sand particles of specific gravity 2.65 and 5 mm organic particles of specific gravity 1.2, the minimum velocity required for removing the sewerage, is
Options- A. 0.30 m/sec
- B. 0.35 m/sec
- C. 0.40 m/sec
- D. 0.45 m/sec
- E. 0.50 m/sec. Discuss
- 5. Aerobic bacterias
Options- A. flourish in the presence of free oxygen
- B. consume organic matter as their food
- C. oxidise organic matter in sewage
- D. All the above. Discuss
- 6. The ratio of minimum hourly flow to the average flow of sewage is
Options- A. 1/4
- B. 1/3
- C. 1/2
- D. 3/4 Discuss
- 7. Dilution method of disposing off sewage, is not preferred to
Options- A. when sewage is fresh
- B. when diluting water has high dissolved oxygen content
- C. when diluting water is used for water supply near the point of sewage disposed
- D. when the diluting water is having flow currents
- E. none of these. Discuss
- 8. An inverted siphon is designed generally for
Options- A. one pipe
- B. two pipes
- C. three pipes
- D. four pipes. Discuss
- 9. The non-clog pump which permits solid matter to pass out with the liquid sewage, is
Options- A. centrifugal pump
- B. reciprocating pump
- C. pneumatic ejector
- D. none of these. Discuss
- 10. Pick up the in-correct statement from the following :
Options- A. Manholes are provided in sewer pipes at suitable intervals
- B. Catch basins are generally provided in sewers for carrying drainage discharge
- C. Inlets are generally provided in all sewers
- D. None of these. Discuss
Waste Water Engineering problems
Search Results
Correct Answer: bacterias
Correct Answer: 1.36 m
Correct Answer: 0.25
Correct Answer: 0.45 m/sec
Correct Answer: All the above.
Correct Answer: 1/3
Correct Answer: when diluting water is used for water supply near the point of sewage disposed
Correct Answer: three pipes
Correct Answer: centrifugal pump
Correct Answer: Inlets are generally provided in all sewers
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