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- Question
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.
- Correct Answer
- 4 hours
- 1. Pick up the incorrect statement from the following :
Options- A. The net amount of water which joins the surface streams in a catchment, is known as surface run-off
- B. The amount of water which joins the stream from the underground water, is called base flow
- C. The yearly run off in cm depth over the catchment, is termed as the yield of the drainage basin
- D. The yield of drainage in cm depth multiplied by the area of the catchment gives the annual volume of water
- E. None of these. Discuss
- 2. An aquiclude is
Options- A. a non artesian aquifer
- B. an artesian acquifer
- C. a confined bed of impervious material between acquifers
- D. a large water body under ground. Discuss
- 3. A circular gravity aqueduct is not generally preferred to because of
Options- A. its maximum hydraulic mean depth
- B. maximum area per unit of wetted perimeter
- C. minimum cost of construction
- D. its proper support on the ground. Discuss
- 4. Dissolved carbon dioxide, can be removed from the supply main by
Options- A. sedimentation
- B. aeration
- C. chlorination
- D. coagulation
- E. none of these. Discuss
- 5. The ratio of total capacity and dead storage is kept
Options- A. 8
- B. 6
- C. 4
- D. 3
- E. 2 Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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.
Discuss
Water Supply Engineering problems
Search Results
Correct Answer: None of these.
Correct Answer: a confined bed of impervious material between acquifers
Correct Answer: its proper support on the ground.
Correct Answer: aeration
Correct Answer: 4
Correct Answer: are not suitable for variable heads
Correct Answer: total quantity of water available in the well
Correct Answer: to increase rate of settlement of suspended materials
Correct Answer: negative pressure
Correct Answer:
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