In turbulent flow, a rough pipe has the same friction factor as a smoo

1.	In turbulent flow, a rough pipe has the same friction factor as a smooth pipe
A.	in the zone of complete turbulence.
B.	when the roughness projections are much smaller than the thickness of the laminar film.
C.	everywhere in the transition zone.
D.	when the friction factor is independent of the Reynold's number.
Answer» C. everywhere in the transition zone.

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In turbulent flow, a rough pipe has the same friction factor as a smooth pipe

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