Question

In the field determination, pumping must continue at a ________

(a) uniform rate for sufficient time to approach steady state

(b) non- uniform rate for sufficient time to approach steady state

(c) uniform rate until just before time to approach steady state

(d) non-uniform rate until just before time to approach steady state

This question was addressed to me in examination.

My question is based upon Well Hydraulics topic in portion Well Hydraulics of Geotechnical Engineering I

Answer 1

Correct choice is (a) uniform rate for sufficient time to approach steady state

Best explanation: The steady state condition is the one in which the drawdown changes negligibly with time. In order to get accurate results, pumping must continue at a uniform rate for sufficient time in the field determination to approach steady state.