A pipe is defined as 'hydraulically smooth', if the friction factor_________________?
Correct answer: B. For a given Reynolds number remains constant even on further smoothening of the pipe
- A. Is not a function of Reynolds number
- B. For a given Reynolds number remains constant even on further smoothening of the pipe
- C. Is zero irrespective of the Reynolds number
- D. None of these
Explanation
In a hydraulically smooth pipe, roughness is too small to affect the flow, so the friction factor depends only on Reynolds number. Further smoothing therefore does not change it at a fixed Reynolds number.
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