Water Supply Engineering
When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied

By gravitational system
By pumping system
All listed here
Both (A) and (B)

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Water Supply Engineering
Time of concentration

duration of rainfall.
is the time taken, for precipitation
time taken for the storm water to travel from the most remote point to the drain.
time taken for all the ran off to reach the drain

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