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Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will_______________?
A. IncreaseCorrect Answer
B. Decrease
C. Remain unchanged
D. Increase or decrease depending on the pipe material
Correct Option: A. Increase
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