Friction factor for a hydraulically smooth pipe at N Re = 2100 is f 1 – McqOptions

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1.	Friction factor for a hydraulically smooth pipe at N Re = 2100 is f 1 . If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of N Re , will
A.	increase.
B.	decrease.
C.	remain unchanged.
D.	increase or decrease depending on the pipe material.
Answer» B. decrease.

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