Discussion
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- Question
The sludge does not contain waste water from
Options- A. bath rooms
- B. wash basins
- C. kitchen sinks
- D. toilets.
- Correct Answer
- toilets.
- 1. 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
- 2. The most widely used pump for lifting sewage is
Options- A. centrifugal pump
- B. reciprocating pump
- C. pneumatic ejector
- D. air pressure pump. Discuss
- 3. Design period of 40 to 50 years is adopted for
Options- A. branch sewers
- B. main sewers
- C. trunk sewers
- D. all the above. Discuss
- 4. Which one of the following statements regarding septic tanks is wrong :
Options- A. a gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided
- B. the outlet invert level is kept 5 to 7.5 cm below the inlet invert level
- C. the minimum width of septic level is 90 cm
- D. the depth of tank is kept equal to its width. Discuss
- 5. 5 days-biochemical oxygen demand (BOD5) is taken at a temperature of
Options- A. 0°C
- B. 15°C
- C. 20°C
- D. 25°C. Discuss
- 6. 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
- 7. 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
- 8. 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. Discuss
- 9. The water carried sewerage system removes
Options- A. domestic sewage
- B. industrial sewage
- C. storm sewage
- D. all the above. Discuss
- 10. 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
Waste Water Engineering problems
Search Results
Correct Answer: 45 m
Correct Answer: centrifugal pump
Correct Answer: all the above.
Correct Answer: the depth of tank is kept equal to its width.
Correct Answer: 20°C
Correct Answer: 2 metres/sec
Correct Answer: 2 to 3 mm
Correct Answer: All of the above.
Correct Answer: all the above.
Correct Answer: 5 to 10
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