Civil Engineering - Water Supply Engineering

46. 

Efficiency of removing bacterias from raw water by a slow sand filter, is

A. 80% to 81%
B. 85% to 86%
C. 90% to 97%
D. 98% to 99%.

Answer: Option D

Explanation:

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47. 

De-chlorination is followed by

A. post-chlorination
B. pre-chlorination
C. double-chlorination
D. super-chlorination.

Answer: Option D

Explanation:

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48. 

The bed slope in slow sand filters, is generally kept

A. 1 in 50
B. 1 in 75
C. 1 in 100
D. 1 : 200

Answer: Option C

Explanation:

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49. 

When gravity and pumping systems of water distribution are adopted, the type of distribution reservoir, is

A. elevated tank
B. ground source reservoir
C. intz tank
D. stand pipe.

Answer: Option A

Explanation:

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50. 

The average domestic consumption under normal conditions in an Indian city per day per person, is

A. 105 litres
B. 115 litres
C. 125 litres
D. 135 litres
E. 150 litres.

Answer: Option D

Explanation:

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