Discussion
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- Question
A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is
Options- A. 2.30 m
- B. 2.40 m
- C. 2.45 m
- D. 2.50 m.
- Correct Answer
- 2.45 m
- 1. If the flame of a miner's safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains
Options- A. Hydrogen sulphide
- B. Carbon dioxide
- C. Methane
- D. Oxygen
- E. None of these. Discuss
- 2. R.M.O. expenses include
Options- A. running expenses
- B. maintenance expenses
- C. operation expenses
- D. all the above. Discuss
- 3. The Brake Horse power of the motor (efficiency 60%) required for a pump of capacity 0.075 cumec for a total lift of 12 m, is
Options- A. 10
- B. 15
- C. 20
- D. 25 Discuss
- 4. The flow velocity in detritus tanks is
Options- A. 0.05 m/sec
- B. 0.09 m/sec
- C. 1.25 m/sec
- D. none of these. Discuss
- 5. Cement concrete sewers are only suitable if non-scouring velocity is between
Options- A. 2.5 to 3.0 m/sec
- B. 3.0 to 4.0 m/sec
- C. 3.5 to 4.5 m/sec
- D. 4.5 to 5.5 m/sec. Discuss
- 6. The coagulant which is generally not used for treating the sewage, is
Options- A. alum
- B. ferric chloride
- C. ferric sulphate
- D. chlorinated copperas. Discuss
- 7. If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains
Options- A. Hydrogen sulphide
- B. Carbon dioxide
- C. Methane
- D. Oxygen
- E. None of these. Discuss
- 8. The sewer that unloads the sewage at the point of treatment is called
Options- A. main sewer
- B. outfall sewer
- C. branch sewer
- D. house sewer. Discuss
- 9. The grit chambers of sewage treatment plants, are generally cleaned after
Options- A. 2 days
- B. 5 days
- C. 7 days
- D. 12 days
- E. 14 days. Discuss
- 10. Fresh sewage is generally
Options- A. alkaline
- B. acidic
- C. highly decomposed
- D. a source of objectionable odour. Discuss
Waste Water Engineering problems
Search Results
Correct Answer: Carbon dioxide
Correct Answer: all the above.
Correct Answer: 20
Correct Answer: 0.09 m/sec
Correct Answer: 2.5 to 3.0 m/sec
Correct Answer: alum
Correct Answer: Methane
Correct Answer: outfall sewer
Correct Answer: 14 days.
Correct Answer: alkaline
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