Discussion
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- Question
An inverted siphon is designed generally for
Options- A. one pipe
- B. two pipes
- C. three pipes
- D. four pipes.
- Correct Answer
- three pipes
- 1. 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
- 2. 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
- 3. 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.
Discuss
- 4. Chlorination of water is done for the removal of
Options- A. bacterias
- B. suspended solids
- C. sediments
- D. hardness. Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to
Options- A. initial demand
- B. first stage demand
- C. carbonaceous demand
- D. all of these. Discuss
- 9. For treating the sewage of a large city, you will recommend
Options- A. a sedimentation tank and an activated sludge treatment plant
- B. a plant consisting of Imhoff tanks with low rate trickling filters
- C. sedimentation tanks with high rate trickling filters
- D. none of these. Discuss
- 10. A rainfall may be classified as acidic if its pH value is less or equal to
Options- A. 6
- B. 7
- C. 5
- D. 6.5 Discuss
Waste Water Engineering problems
Search Results
Correct Answer: when diluting water is used for water supply near the point of sewage disposed
Correct Answer: 1/3
Correct Answer:
Correct Answer: bacterias
Correct Answer: 1.36 m
Correct Answer: centrifugal pump
Correct Answer: Inlets are generally provided in all sewers
Correct Answer: all of these.
Correct Answer: a sedimentation tank and an activated sludge treatment plant
Correct Answer: 5
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