# Civil Engineering - Water Supply Engineering

### Exercise :: Water Supply Engineering - Section 2

41.

The water level in an open well was depressed by pumping 2.5 m and recuperated 2.87 m in 3 hours and 50 minutes. The yield of the well per minute is

 A. 0.0033 B. 0.0044 C. 0.0055 D. 0.0066

Explanation:

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42.

Rapid gravity filter can only remove turbidity of water upto

 A. 15 to 25 gm/litre B. 25 to 30 gm/litre C. 30 to 35 cm/litre D. 35 to 40 gm/litre E. 50 gm/litre.

Explanation:

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43.

Pick up the correct statement from the following :

 A. The amount of rainfall in 24 hours, is known as daily rainfall B. The amount of rainfall in one year, is known as annual rainfall C. The rain cycle period in India is taken as 35 years D. The ratio of the actual rainfall in the year to the normal rainfall at a place, is called index of the wetness E. All the above.

Explanation:

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44.

The best process of disinfection of public water supply, is by

Explanation:

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45.

Pick up the correct statement from the following :

 A. A hydrograph is a plot of discharge versus time B. A mass curve is a plot of accumulated flow versus time C. The mass curve continuously rises D. The slope of the mass curve at any time is a measure of the inflow rate at that time E. All the above.