Civil Engineering - Water Supply Engineering

31. 

Asbestos pipes are

A. light in weight and easy to transport
B. highly resistant to corrosion
C. high flexible to accommodate deflection upto 12°
D. very much smooth and hydraulically efficient
E. all the above.

Answer: Option E

Explanation:

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32. 

The maximum depth of sedimentation tanks is limited to

A. 2 m
B. 3 m
C. 4 m
D. 5 m
E. 6 m.

Answer: Option E

Explanation:

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33. 

By boiling water, hardness can be removed if it is due to

A. calcium sulphate
B. magnesium sulphate
C. calcium nitrate
D. calcium bicarbonate
E. none of these.

Answer: Option D

Explanation:

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34. 

Q is the discharge from an unconfined tube well with depression head s through its pipe of radius rw. If the radius of influence is R, the length of the required strainer, is

A.
B.
C.
D.

Answer: Option C

Explanation:

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35. 

For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

A. Darcy's formula
B. Slichter's formula
C. Hazen's formula
D. Lacy's formula.

Answer: Option A

Explanation:

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