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- Question
The ensure proper growth of children's teeth, the quantity of flouride used in water mains, is
Options- A. 1 mg/litre
- B. 2 mg/litre
- C. 3 mg/litre
- D. 4 mg/litre
- E. 5 mg/litre.
- Correct Answer
- 1 mg/litre
- 1. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form
Options- A. Mono-chloramine (NHCl)
- B. Di-chloramine (NH2Cl)
- C. Nitrogen trichloramine (NCl3)
- D. All the above. Discuss
- 2. Pick up the incorrect statement from the following :
Options- A. Porosity of clay sand soil is 45%
- B. Porosity of pure sand is 35%
- C. Porosity of sand stone is up to 15%
- D. Least porosity is that of granite and quartz
- E. None of these. Discuss
- 3. Pick up the correct statement from the following :
Options- A. Deposition of calcium carbonate on the inside of the well pipe, causes incrustation of the pipe
- B. Incrustation of the pipe reduces the discharge
- C. Acidic waters cause corrosion of the pipes
- D. Corrosion results due to excessive withdrawal of sand along with water
- E. All the above. Discuss
- 4. Generally, first portion of a logistic curve for the population growth of a developing city, represents the growth of
Options- A. increasing
- B. decreasing
- C. constant
- D. all the above. Discuss
- 5. The requirement of water per capita per day, is
Options- A. 90 litres
- B. 150 litres
- C. 250 litres
- D. 400 litres. Discuss
- 6. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called
Options- A. Working pressure
- B. Design pressure
- C. Test pressure
- D. Hydrostatic pressure. Discuss
- 7. Normal values of overflow rate for sedimentation tanks using coagulants in litres/hr/m2 , generally range between
Options- A. 250 to 500
- B. 500 to 750
- C. 750 to 1000
- D. 1000 to 1250 Discuss
- 8. Ground water from artesian wells
Options- A. contains no suspended materials
- B. contains dissolved salts
- C. may be saltish and hard
- D. generally require lesser treatment
- E. all the above. Discuss
- 9. If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in
Options- A. 10 years
- B. 15 years
- C. 20 years
- D. 25 years
- E. 50 years. Discuss
- 10. The total domestic consumption in a city water supply, is assumed
Options- A. 20%
- B. 30%
- C. 40%
- D. 60%. Discuss
Water Supply Engineering problems
Search Results
Correct Answer: All the above.
Correct Answer: None of these.
Correct Answer: All the above.
Correct Answer: increasing
Correct Answer: 90 litres
Correct Answer: Test pressure
Correct Answer: 1000 to 1250
Correct Answer: all the above.
Correct Answer: 25 years
Correct Answer: 60%.
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