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- Question
In sewers the effect of scouring is more on
Options- A. top side
- B. bottom side
- C. horizontal side
- D. all sides.
- Correct Answer
- bottom side
- 1. For evaporation and measurement of settlable solids, the apparatus used, is
Options- A. a jar
- B. a breaker
- C. a test tube
- D. an Imhoff cone. Discuss
- 2. The dimensions of a rectangular settling tank are : length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is
Options- A. 204 cu m
- B. 208 cu m
- C. 212 cu m
- D. 216 cu m
- E. 220 cu m. Discuss
- 3. Pick up the correct statement from the following :
Options- A. pH value indicates acidity and alkalinity of sewage
- B. In acidic sewage, the pH value is less than 7
- C. In alkaline sewage, the pH value is more than 7
- D. Fresh sewage is generally alkaline
- E. All the above. Discuss
- 4. The asbestos cement pipes are generally laid
Options- A. horizontally
- B. vertically
- C. at an angle of 30°
- D. at an angle of 60°. Discuss
- 5. In SI units the power of sound is represented in
Options- A. kgs
- B. joules
- C. neutons
- D. watts. Discuss
- 6. In olden days the type of section adopted in trunk and out fall sewers was
Options- A. parabolic shaped
- B. horse shoe shaped
- C. egg shaped
- D. circular shaped. Discuss
- 7. For house drainage minimum gradient is
Options- A. 1 in 60
- B. 1 in 80
- C. 1 in 10
- D. 1 in 400 Discuss
- 8. For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed
Options- A. 3 PPm
- B. 4 PPm
- C. 5 PPm
- D. 10 ppm. Discuss
- 9. If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
Options- A. 200 ppm
- B. 225 ppm
- C. 250 ppm
- D. None of these. Discuss
- 10. The rate of accumulation of sludge in septic tanks is recommended as
Options- A. 30 litres/person/year
- B. 25 litres/person/year
- C. 30 litres/person/month
- D. 25 litres/person/month. Discuss
Waste Water Engineering problems
Search Results
Correct Answer: an Imhoff cone.
Correct Answer: 216 cu m
Correct Answer: All the above.
Correct Answer: vertically
Correct Answer: watts.
Correct Answer: horse shoe shaped
Correct Answer: 1 in 60
Correct Answer: 4 PPm
Correct Answer: 250 ppm
Correct Answer: 30 litres/person/year
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