Friction factor for a hydraulically smooth pipe at Nʀₑ = 2100 is f� – McqOptions

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1.	Friction factor for a hydraulically smooth pipe at Nʀₑ = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of Nʀₑ, will
A.	increase.
B.	decrease.
C.	remain unchanged.
D.	increase or decrease depending on the pipe material.
Answer» B. decrease.

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