Discussion
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- Question
Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for
Options- A. unexpected large scale infiltration of stream water
- B. unexpected increase in the population
- C. under estimates of maximum and average flows
- D. All of the above.
- Correct Answer
- All of the above.
- 1. The spacing of bars of perforations of fine screens used for the treatment of sewage, is
Options- A. 2 to 3 mm
- B. 3 to 5 mm
- C. 5 to 8 mm
- D. 8 to 10 mm. Discuss
- 2. The self-cleansing velocity of water flowing through pipe lines, is
Options- A. 2 metres/sec
- B. 1 metre/sec
- C. 0.5 metre/sec
- D. 0.25 metre/sec. Discuss
- 3. The sludge does not contain waste water from
Options- A. bath rooms
- B. wash basins
- C. kitchen sinks
- D. toilets. Discuss
- 4. The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is
Options- A. 20 m
- B. 30 m
- C. 45 m
- D. 75 m. Discuss
- 5. The most widely used pump for lifting sewage is
Options- A. centrifugal pump
- B. reciprocating pump
- C. pneumatic ejector
- D. air pressure pump. Discuss
- 6. The water carried sewerage system removes
Options- A. domestic sewage
- B. industrial sewage
- C. storm sewage
- D. all the above. Discuss
- 7. The design period in years for pumping plants, is
Options- A. 1
- B. 2 to 3
- C. 3 to 5
- D. 5 to 10 Discuss
- 8. The Chezy's constant C in the formula V = C rs depends upon
Options- A. size of the sewer
- B. shape of the sewer
- C. roughness of sewer surface
- D. hydraulic characteristics of sewer
- E. all the above. Discuss
- 9. Water content of sewage is about
Options- A. 90%
- B. 95%
- C. 99%
- D. 9.9%. Discuss
- 10. For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed
Options- A. 1.5
- B. 2.0
- C. 2.5
- D. 3.0
- E. 3.5 Discuss
Waste Water Engineering problems
Search Results
Correct Answer: 2 to 3 mm
Correct Answer: 2 metres/sec
Correct Answer: toilets.
Correct Answer: 45 m
Correct Answer: centrifugal pump
Correct Answer: all the above.
Correct Answer: 5 to 10
Correct Answer: all the above.
Correct Answer: 9.9%.
Correct Answer: 1.5
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