The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _______________ the mean velocity of flow?
Correct answer: B. Directly proportional to square of
- A. Directly proportional to
- B. Directly proportional to square of
- C. Inversely proportional to
- D. Inversely proportional to square of
Explanation
The Darcy-Weisbach relation gives head loss as h_f = f(L/D)(V²/2g), so with pipe and friction factor fixed, loss varies with the square of mean velocity. The key distinction is V², not V.
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