Civil Engineering - Water Supply Engineering

36. 

The permissible amount of nitrites present in potable water, is

A. 10 ppm
B. 15 ppm
C. 20 ppm
D. 45 ppm
E. Nil.

Answer: Option E

Explanation:

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37. 

Water having pH value as 6, is

A. alkaline
B. acidic
C. neutral
D. none of these.

Answer: Option B

Explanation:

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38. 

Alum is chemically

A. Copper sulphate
B. Aluminium sulphate
C. Ferrous sulphate
D. Ferric sulphate.

Answer: Option B

Explanation:

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39. 

If w is the weight of water per cubic metre, Q is the discharge in cubic metres per sec and H is the total head, the required water horse power of the pump, is

A.
B.
C.
D.
E. none of these.

Answer: Option A

Explanation:

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40. 

Perched acquifers are generally found

A. on the surface of the ground
B. below the surface of the ground but above water table
C. below the water table
D. all the above.

Answer: Option B

Explanation:

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