Detention period of a settling tank is________. - Water Supply Engineering Quiz

Civil Engineering : Water Supply Engineering - Quiz(MCQ)

Detention period of a settling tank is________.

average time for which water is retained in tank

time required for flow of water to fill the tank fully

average theoretical time required for water to flow through the tank

All of the above

Correct Answer : All of the above

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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