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- Question
If the depth of partial flow in a sewer of diameter 2 m, is 50 cm, its wetted perimeter is
Options- A. ?
- B.
- C.
- D.
- E.
- Correct Answer
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- 1. Pick up the correct statement from the following :
Options- A. Indore method of composting involves decomposition under aerobic conditions
- B. Bangalore method of composting involves decomposing under anaerobic conditions
- C. Fully stabilised refuse by the Bangalore method of compositing is a powdery mass called humus
- D. all of these. Discuss
- 2. The algae dies out in the zone of
Options- A. degradation
- B. active decomposition
- C. recovery
- D. cleaner water. Discuss
- 3. Maximum permissible velocity 1.5 m/sec, is adopted in drains
Options- A. with beds of rocks and gravels
- B. lined with stones
- C. both (a) and (b)
- D. neither (a) nor (b). Discuss
- 4. In sewers the gas generally found, is
Options- A. Hydrogen sulphide (H2S)
- B. Carbon dioxide (CO2)
- C. Methane (CH4)
- D. Petrol vapours
- E. All the above. Discuss
- 5. Pick up the correct statement from the following :
Options- A. Turbidity is more in strong sewage
- B. The black colour indicates septic sewage
- C. The fresh sewage is practically odourless
- D. The sewage omits offensive odours after four hours
- E. All the above. Discuss
- 6. Fresh sewage may become stale in
Options- A. one hour
- B. two to three hours
- C. three to four hours
- D. six hours.
- E. ten hours. Discuss
- 7. The liquid wastes from kitchens, bath rooms and wash basins, is not called
Options- A. liquid waste
- B. sullage
- C. sewage
- D. none of these. Discuss
- 8. Rate of flow of sewage is generally assumed
Options- A. more than the rate of water supply
- B. equal to the rate of water supply
- C. less than the rate of water supply
- D. at 150 litres per capita. Discuss
- 9. Which one of the following tests is used for testing sewer pipes :
Options- A. water test
- B. ball test
- C. mirror test
- D. all of these. Discuss
- 10. Hydraulic mean radius is
Options- A. mean radius of sewer
- B. difference in heads between two points in circular pipes
- C. mean of radii in a pipe line of varying cross-sections
- D. cross-sectional area/wetted perimeter. Discuss
Waste Water Engineering problems
Search Results
Correct Answer: all of these.
Correct Answer: degradation
Correct Answer: both (a) and (b)
Correct Answer: All the above.
Correct Answer: All the above.
Correct Answer: three to four hours
Correct Answer: sewage
Correct Answer: less than the rate of water supply
Correct Answer: all of these.
Correct Answer: cross-sectional area/wetted perimeter.
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