# Civil Engineering - Water Supply Engineering

### Exercise :: Water Supply Engineering - Section 4

21.

Dead storage of a reservoir of Q capacity generally provided for silt deposition during its life time, is generally kept

 A. 1/8th Q B. 1/6th Q C. 1/5th Q D. 1/4th Q E. 1/3rd Q.

Explanation:

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22.

If the specific capacity of a well is 0.3183 x 10-3 per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is

 A. 8 litres/sec B. 10 litres/sec C. 12 litres/sec D. 14 litres/sec E. 16 litres/sec.

Explanation:

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23.

The factor to be considered for the source of city water supply, is

 A. quantity and quality of the available water B. elevation of the source of water C. general terrain intervening the area D. all the above.

Explanation:

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24.

Pick up the correct statement from the following :

 A. Domestic use of water is 50% of total consumption B. Average consumption of commercial use of water is 25% of total consumption C. Consumption of water on public use is 10% of total consumption D. Waste water and leakage is 15% of total consumption E. all the above.

Explanation:

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25.

Yield of a drainage basin is :

 A. run off of the area expressed as instantaneous rate B. average run off over a short period C. total volume of water flowing annually D. all the above.