One Question per Day ---------- Multiple-choice Questions on Basic Process Knowledge (September 28)
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You receive a wealth reward just for participating. Multiple-choice question: When fluid flows inside a circular pipe, the flow velocity is highest at the center of the pipe. In the case of turbulent flow, what is the relationship between the average flow velocity and the maximum flow velocity at the center of the pipe? A. Um=1/2Umax ； B. Um=0.8Umax ； C. Um=3/2Umax
C. Um=3/2Umax