Civil Engineering - Water Supply Engineering

21. 

Permanent hardness of water can be removed by

A. adding alum
B. adding lime
C. adding chlorine
D. boiling
E. zeolite process.

Answer: Option E

Explanation:

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22. 

Demand for public uses in a city, does not include water required for

A. watering of public parks
B. watering of public gardens
C. sprickling on roads
D. drinking purposes.

Answer: Option D

Explanation:

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23. 

The chloride content of treated water for public supplies should not exceed

A. 100 ppm
B. 150 ppm
C. 200 ppm
D. 250 ppm
E. 300 ppm.

Answer: Option D

Explanation:

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24. 

An aquiclude is

A. a non artesian aquifer
B. an artesian acquifer
C. a confined bed of impervious material between acquifers
D. a large water body under ground.

Answer: Option C

Explanation:

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25. 

Pick up the incorrect statement from the following :

A. The net amount of water which joins the surface streams in a catchment, is known as surface run-off
B. The amount of water which joins the stream from the underground water, is called base flow
C. The yearly run off in cm depth over the catchment, is termed as the yield of the drainage basin
D. The yield of drainage in cm depth multiplied by the area of the catchment gives the annual volume of water
E. None of these.

Answer: Option E

Explanation:

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