Discussion
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- Question
In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is
Options- A.
- B.
- C.
- D.
- Correct Answer
-
- 1. In sewers designed with self cleansing velocity,
Options- A. the bottom is silted
- B. the bottom is scoured
- C. both silting and scouring occur at the bottom
- D. neither silting nor scouring occurs at the bottom. Discuss
- 2. The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10°C, is
Options- A. 213.5 cm/sec
- B. 313.5 cm/sec
- C. 413.5 cm/sec
- D. 500 cm/sec. Discuss
- 3. In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is
Options- A.
- B.
- C.
- D.
Discuss
- 4. If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of
Options- A. degradation
- B. active decomposition
- C. recovery
- D. cleaner water
- E. none of these. Discuss
- 5. In 1000 kg of sewage, the total solids approximate
Options- A. 0.5 to 1.0 kg
- B. 1 kg to 2.0 kg
- C. 5 kg to 7.5 kg
- D. 7.5 kg to 10 kg. Discuss
- 6. Hume steel pipes are
Options- A. steel pipes
- B. R.C.C. pipes
- C. steel shell coated from inside with cement mortar
- D. steel shell coated from outside with cement mortar
- E. both (c) and (d). Discuss
- 7. The ratio of design discharge to the surface area of a sedimentation tank is called
Options- A. surface loading
- B. overflow rate
- C. overflow velocity
- D. all of these. Discuss
- 8. Sewer pipes need be checked for
Options- A. minimum flow
- B. maximum flow
- C. both (a) and (b)
- D. none of these. Discuss
- 9. The rational formula for peak drainage discharge, was evolved by
Options- A. Fruhling
- B. Lloyd David
- C. Kuichling
- D. All of these. Discuss
- 10. Antisyphonage pipe is fitted
Options- A. at the end of septic tanks
- B. on manholes
- C. with a W.C. trap
- D. at the beginning of sewer line. Discuss
Waste Water Engineering problems
Search Results
Correct Answer: neither silting nor scouring occurs at the bottom.
Correct Answer: 313.5 cm/sec
Correct Answer:
Correct Answer: active decomposition
Correct Answer: 0.5 to 1.0 kg
Correct Answer: both (c) and (d).
Correct Answer: all of these.
Correct Answer: both (a) and (b)
Correct Answer: All of these.
Correct Answer: with a W.C. trap
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