Before constructing a dam, the factor to be considered for controlling sedimentation, is

Civil Engineering : Water Supply Engineering - Quiz(MCQ)

selection of dam site

construction of check dams

providing vegetation screens

All of the above

Correct Answer : All of the above

Explanation : * selection of dam site
* construction of check dams
* providing vegetation screens
* providing under-sluices in the dam

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Normal values of overflow rate for plain sedimentation tanks in litres/hr/m², generally range between

100 to 250

250 to 500

500 to 750

750 to 1000

Correct Answer : Option (C) : 500 to 750

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

intz tank

elevated tank

stand pipe

ground source reservoir

Correct Answer : Option (B) : elevated tank

If n is porosity, y is specific yield and r is specific retention of any soil, the relationship which holds good, is_____.

n + y = r

y + r = n

n + r + y = 0

n + y + r = 1

Correct Answer : Option (B) : y + r = n