Discussion
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- Question
Q is the discharge from an unconfined tube well with depression head S through a pipe of radius rw. If the radius of influence is R, the minimum required length of the strainer, is
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. In a rapid sand filter, air binding is caused due to excessive
Options- A. negative pressure
- B. pressure
- C. turbidity
- D. water pressure
- E. all the above. Discuss
- 2. Chemical coagulation of drinking water, is done
Options- A. to settle suspended materials
- B. to increase rate of settlement of suspended materials
- C. to remove the bacterias
- D. none of these. Discuss
- 3. Specific yield of a well is
Options- A. quantity of water than can be drawn from the well
- B. flow of water per unit time
- C. total quantity of water available in the well
- D. quantity of water per unit time per unit draw-down. Discuss
- 4. Reciprocating pumps
Options- A. are not suitable for variable heads
- B. are four times costlier than centrifugal pumps
- C. are not suitable for pumping water containing sediments
- D. single stroke produce pulsating flow
- E. none of these. Discuss
- 5. In an artesian acquifer, the draw downs in two observation wells at distances 100 m, and 200 m were found same after one hour and x hours respectively. The value of x, is
Options- A. 2 hours
- B. 4 hours
- C. 9 hours
- D. 16 hours. Discuss
- 6. Demand for public uses in a city, does not include water required for
Options- A. watering of public parks
- B. watering of public gardens
- C. sprickling on roads
- D. drinking purposes. Discuss
- 7. 'Shrouding' is essentially provided in
Options- A. strainer type wells
- B. cavity type wells
- C. slotted type well
- D. all the above. Discuss
- 8. The coefficient of permeability of soils, is generally expressed in
Options- A. cm/sec
- B. cm/minute
- C. cm2/sec
- D. cm2/minute. Discuss
- 9. Normal values of overflow rate for plain sedimentation tanks in litres/hr/m2, generally range between
Options- A. 100 to 250
- B. 250 to 500
- C. 500 to 750
- D. 750 to 1000 Discuss
- 10. 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
Water Supply Engineering problems
Search Results
Correct Answer: negative pressure
Correct Answer: to increase rate of settlement of suspended materials
Correct Answer: total quantity of water available in the well
Correct Answer: are not suitable for variable heads
Correct Answer: 4 hours
Correct Answer: drinking purposes.
Correct Answer: slotted type well
Correct Answer: cm/sec
Correct Answer: 500 to 750
Correct Answer: silica
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