Waste Water Engineering problems
- 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
Correct Answer: an Imhoff cone.
- 2. In sewers the effect of scouring is more on
Options- A. top side
- B. bottom side
- C. horizontal side
- D. all sides. Discuss
Correct Answer: bottom side
- 3. 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
Correct Answer: horse shoe shaped
- 4. For house drainage minimum gradient is
Options- A. 1 in 60
- B. 1 in 80
- C. 1 in 10
- D. 1 in 400 Discuss
Correct Answer: 1 in 60
- 5. 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
Correct Answer: 4 PPm
- 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
Correct Answer: 250 ppm
- 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
Correct Answer: 30 litres/person/year
- 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
Correct Answer: Glazed stonewares.
- 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
Correct Answer: 1 in 120
- 10. The drop man holes are generally provided in sewers for
Options- A. industrial areas
- B. large town ships
- C. hilly town ships
- D. cities in plains. Discuss
Correct Answer: hilly town ships
More in Civil Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.