Discussion
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- Question
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.
- Correct Answer
- 4 PPm
- 1. For house drainage minimum gradient is
Options- A. 1 in 60
- B. 1 in 80
- C. 1 in 10
- D. 1 in 400 Discuss
- 2. 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
- 3. In sewers the effect of scouring is more on
Options- A. top side
- B. bottom side
- C. horizontal side
- D. all sides. Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. House connections to the laterals is generally made by
Options- A. R.C.C.
- B. P.C.C.
- C. Cast iron
- D. Glazed stonewares. Discuss
- 9. If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is
Options- A. 1 in 60
- B. 1 in 100
- C. 1 in 120
- D. none of these. Discuss
- 10. An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at
Options- A. 25°
- B. 35°
- C. 45°
- D. 55°
- E. 60° Discuss
Waste Water Engineering problems
Search Results
Correct Answer: 1 in 60
Correct Answer: horse shoe shaped
Correct Answer: bottom side
Correct Answer: an Imhoff cone.
Correct Answer: 216 cu m
Correct Answer: 250 ppm
Correct Answer: 30 litres/person/year
Correct Answer: Glazed stonewares.
Correct Answer: 1 in 120
Correct Answer: 45°
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