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- Question
Rapid gravity filters
Options- A. were developed by G.W. Fullar
- B. make use of coarser sand with effective size as 0.5 mm
- C. yield as high as 30 times the yield of slow sand filters
- D. are fed with coagulation treated water
- E. all the above.
- Correct Answer
- all the above.
- 1. A centrifugal pump is required to be primed before starting if it is located
Options- A. at higher level than water level of reservoir
- B. at lower level than water level of reservoir
- C. both (a) and (b)
- D. neither (a) nor (b). Discuss
- 2. Water losses in water supply, is assumed as
Options- A. 5%
- B. 7.5%
- C. 10%
- D. 22.5%
- E. 15%. Discuss
- 3. The temporary hardness of water can be removed by
Options- A. boiling
- B. adding lime
- C. adding alum
- D. filtration
- E. sedimentation. Discuss
- 4. Slow sand filter is used if maximum turbidity of raw water is less than
Options- A. 10 gm/litre
- B. 20 gm/litre
- C. 30 gm/litre
- D. 40 gm/litre
- E. 50 gm/litre. Discuss
- 5. Standard unit of turbidity of water is in one litre of distilled water, one milligram of finely divided
Options- A. silica
- B. mud
- C. clay
- D. organic matter. Discuss
- 6. Property of earth to allow water to pass through it, is known as
Options- A. perviousness
- B. porosity
- C. permeability
- D. transmissibility. Discuss
- 7. The chloride content of treated water for public supplies should not exceed
Options- A. 100 ppm
- B. 150 ppm
- C. 200 ppm
- D. 250 ppm
- E. 300 ppm. Discuss
- 8. The external load per unit length of
Options- A. a pipe laid on, or projecting above the undisturbed ground and covered with fills, is proportional to the square of the external diameter of the pipe
- B. a flexible pipe burried in narrow trenches and thoroughly compacted side fills, is proportional to the product of the width of the trench and diameter of the pipe
- C. a rigid pipe burried in a narrow trenches and thoroughly compacted side fills, is proportional to the square of the width of the trench
- D. all the above. Discuss
- 9. Disinfection of drinking water is done to remove
Options- A. turbidity
- B. odour
- C. colour
- D. bacterias
- E. all the above. Discuss
- 10. The formula
for the head loss in conduits is generally known as
Options- A. Hazen-William's formula
- B. Manning's formula
- C. Darcy-Weisbach formula
- D. Nikuradse formula. Discuss
Water Supply Engineering problems
Search Results
Correct Answer: at higher level than water level of reservoir
Correct Answer: 15%.
Correct Answer: boiling
Correct Answer: 50 gm/litre.
Correct Answer: silica
Correct Answer: perviousness
Correct Answer: 250 ppm
Correct Answer: all the above.
Correct Answer: bacterias
Correct Answer: Manning's formula
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