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- Question
Derivation of Thiem's formula
is based on the assumption
Options- A. the aquifer is homogeneous, isotropic and of infinite depth and area
- B. the well is sunk through the full depth of the aquifer
- C. the flow lines are radial and horizontal, and the flow is laminar
- D. for hydraulic gradient in Darcy's equation, tangent value is used for sine value
- E. all the above.
- Correct Answer
- all the above.
- 1. In a reservoir the average volume of sediment deposition is 0.15 million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres and 36 million cubic metres respectively,
Options- A. the reservoir will theoretically be silted in 240 years
- B. the reservoir will start reducing after 60 years
- C. both (a) and (b)
- D. neither (a) nor (b). Discuss
- 2. 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
- 3. Disinfection of drinking water is done to remove
Options- A. turbidity
- B. odour
- C. colour
- D. bacterias
- E. all the above. Discuss
- 4. 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
- 5. 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
- 6. Water is supplied from the source to the treatment plant under gravity in
Options- A. Calcutta
- B. Delhi
- C. Madras
- D. Bombay. Discuss
- 7. The most ideal disinfectant used for drinking water throughout the world, is
Options- A. alum
- B. lime
- C. chlorine
- D. nitrogen
- E. ammonia. Discuss
- 8. Pick up the correct statement from the following :
Options- A. Head loss in smaller size pipes at equal velocities, is less
- B. Cost of pumping is less in smaller size pipes
- C. Cost of smaller pipes is comparatively more
- D. None of these. Discuss
- 9. Pick up the incorrect statement from the following. In take of water supply should
Options- A. be nearer to the treatment plant
- B. receive water from purer zone of the source
- C. be located downstream of waste water disposal point
- D. remain easily accessible during floods. Discuss
- 10. Filtration of water is done to remove
Options- A. colour
- B. odour
- C. turbidity
- D. pathogenic bacteria
- E. all the above. Discuss
Water Supply Engineering problems
Search Results
Correct Answer: both (a) and (b)
Correct Answer: Manning's formula
Correct Answer: bacterias
Correct Answer: all the above.
Correct Answer: 250 ppm
Correct Answer: Bombay.
Correct Answer: chlorine
Correct Answer: None of these.
Correct Answer: be located downstream of waste water disposal point
Correct Answer: turbidity
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