Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. I – McqOptions

MCQOPTIONS

1.	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.	Increase
B.	Decrease
C.	Remain unchanged
D.	Increase or decrease depending on the pipe material
Answer» B. Decrease

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