Civil Engineering - Water Supply Engineering

36. 

Water may contain

A. bicarbonate alkalinity
B. carbonate alkalinity
C. hydroxide alkalinity
D. caustic alkalinity
E. all the above.

Answer: Option E

Explanation:

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37. 

Pick up the correct statement from the following :

A. The pH value of neutral water is 7
B. The maximum acidity is obtained when pH value is zero
C. The maximum alkalinity is obtained when pH value is 14.
D. All the above.

Answer: Option D

Explanation:

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38. 

For controlling algae, the most commonly used chemical, is

A. copper sulphate
B. alum
C. lime
D. bleaching powder.

Answer: Option A

Explanation:

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39. 

According to Godrich the ratio of peak demand rate to mean demand is

A.
B.
C.
D.
E. All the above.

Answer: Option E

Explanation:

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40. 

The head against which the motor works for lifting water, is

A. maximum depth of water table below ground level
B. maximum depression head
C. velocity head
D. frictional losses in the delivery pipe
E. all the above.

Answer: Option E

Explanation:

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