Civil Engineering - Water Supply Engineering

46.
The U.C. (uniformity coefficient) for the best filter media sand should be
2
3
4
5
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
Pick up the correct statement from the following :
Deposition of calcium carbonate on the inside of the well pipe, causes incrustation of the pipe
Incrustation of the pipe reduces the discharge
Acidic waters cause corrosion of the pipes
Corrosion results due to excessive withdrawal of sand along with water
All the above.
Answer: Option
Explanation:
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48.
Specific yield of a well is
quantity of water than can be drawn from the well
flow of water per unit time
total quantity of water available in the well
quantity of water per unit time per unit draw-down.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
Normal values of overflow rate for plain sedimentation tanks in litres/hr/m2, generally range between
100 to 250
250 to 500
500 to 750
750 to 1000
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
The formula for the head loss in conduits is generally known as
Hazen-William's formula
Manning's formula
Darcy-Weisbach formula
Nikuradse formula.
Answer: Option
Explanation:
No answer description is available. Let's discuss.