Friction factor for turbulent flow in a new pipe is given by____________________?
Correct answer: B. f = 0.04/(NRe)0.16
- A. f = 16/NRe
- B. f = 0.04/(NRe)0.16
- C. f = 0.22 NRe
- D. 5
- E. f = 25/NRe
Explanation
For turbulent flow in a hydraulically smooth or new pipe, an empirical relation is f ≈ 0.04/Re⁰·¹⁶, with the exact coefficient depending on the friction-factor convention and correlation range. The other expressions either describe laminar flow or are not valid friction-factor correlations.
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