Water Supply Engineering
If the chosen diameter of a pipe, is less than the economical diameter

Cost of pipe will be less
Cost of pumping will be more than saving
All listed here
Head loss will be high

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Water Supply Engineering
While determining the yield of open wells by the pumping test

Maximum safe yield of an open well, is expected at critical depression head
Depression head resulting at critical velocity, is called critical depression head
Working head is generally limited to ?rd of the critical depression head
Velocity of recharging water, increases with depression head

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