During ageing of fluid carrying pipes, the__________________?
Correct answer: B. Absolute roughness increases linearly with time
- A. Pipe becomes smoother with use
- B. Absolute roughness increases linearly with time
- C. Absolute roughness decreases with time
- D. Friction factor increases linearly with time
Explanation
Corrosion and deposition during pipe ageing increase the internal absolute roughness, which generally raises frictional resistance. In the standard simplified treatment, this increase is taken as approximately linear with time.
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