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- Question
P0, P1, P2 be the populations of a city at times t0, t1 and t2 = 2t1, the saturation value of the population Ps of the city, is
Options- A.
- B.
- C.
- D.
- E. None of these.
- Correct Answer
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- 1. Time of concentration
Options- A. is the time taken, for precipitation
- B. duration of rainfall.
- C. time taken for all the ran off to reach the drain
- D. time taken for the storm water to travel from the most remote point to the drain. Discuss
- 2. Sunlight
Options- A. helps growth of bacterias
- B. impedes growth of algae
- C. increases dissolved oxygen content
- D. reduces turbidity. Discuss
- 3. Pick up the correct statement from the following :
Options- A. Detention period for plain sedimentation tanks ranges between 4 to 8 hours
- B. Detention period for sedimentation tanks, using coagulants usually ranges between 2 to 4 hours
- C. The horizontally flow velocity in sedimentation tanks, is generally limited to 0.3 m/minute
- D. All the above. Discuss
- 4. Economic height of a dam is the height corresponding to which
Options- A. cost of the dam per unit of storage is minimum
- B. amount of silting is less
- C. cost of dam per unit storage is maximum
- D. free board provided is least
- E. none of these. Discuss
- 5. Pick up the incorrect statement from the following regarding fire hydrants
Options- A. Fire hydrants are fitted in water mains at 100 m to 150 m apart at fire
- B. The minimum water pressure hydrants, is kept 1.5 kg/cm2
- C. The water at pressure 1 to 1.5 kg/cm2 is made available for 4 to 5 hours for constant use
- D. None of these. Discuss
- 6. In slow sland filters, the turbidity of raw water can be removed only up to
Options- A. 60 mg/litre
- B. 75 mg/litre
- C. 100 gm/litre
- D. 150 mg/litre. Discuss
- 7. Q is the discharge from an unconfined tube well with depression head s through its pipe of radius rw. If the radius of influence is R, the length of the required strainer, is
Options- A.
- B.
- C.
- D.
Discuss
- 8. As per IS : 1172-1963, water required per head per day for average domestic purposes, is
Options- A. 50 litres
- B. 65 litres
- C. 85 litres
- D. 105 litres
- E. 135 litres. Discuss
- 9. By boiling water, hardness can be removed if it is due to
Options- A. calcium sulphate
- B. magnesium sulphate
- C. calcium nitrate
- D. calcium bicarbonate
- E. none of these. Discuss
- 10. If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is
Options- A. 1880 kilo litres
- B. 2880 kilo litres
- C. 3880 kilo litres
- D. 4880 kilo litres. Discuss
Water Supply Engineering problems
Search Results
Correct Answer: time taken for the storm water to travel from the most remote point to the drain.
Correct Answer: impedes growth of algae
Correct Answer: All the above.
Correct Answer: cost of the dam per unit of storage is minimum
Correct Answer: None of these.
Correct Answer: 60 mg/litre
Correct Answer:
Correct Answer: 135 litres.
Correct Answer: calcium bicarbonate
Correct Answer: 2880 kilo litres
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