Question

In using Darcy-Weisbach equation for flow in a pressure conduit, what percentage error is introduced in Q when f is misjudged by 20 percent?

Answer 1

Answer:

-10 is the correct ans

Explanation:

dQ/Q= -1/2 (df/f)

(dQ/Q)×100=100/2 (df/f)

= -100/2× (20/100)

=-10% ans