The friction factor is___________________?
Correct answer: D. None of these
- A. Always inversely proportional to the Reynolds number
- B. Not dimensionless
- C. Not dependent on the roughness of the pipe
- D. None of these
Explanation
The friction factor is dimensionless and depends on Reynolds number and, in turbulent flow, relative pipe roughness. Since it is not always inversely proportional to Reynolds number, none of the first three statements is generally true.
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