Time of concentration________________?
A. is the time taken, for precipitation
B. duration of rainfall.
C. time taken for all the ran off to reach the drainD. time taken for the storm water to travel from the most remote point to…
Corrosion of well pipes may not be reduced by_________________?
A. reducing the draw down and the pumg rate
B. reducing the flow velocity
C. using thicker pipesD. using screens having larger area of openings
E. none of these…
For determining the velocity of flow of underground water, the most commonly used non-empirical formula is________________?
A. Darcy’s formula
B. Slichter’s formula
C. Hazen’s formula
D. Lacy’s formula…