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

ncrease or decrease depending on the pipe material

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

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.	ncrease
B.	ecrease
C.	emain unchanged
D.	ncrease or decrease depending on the pipe material
Answer» B. ecrease

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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

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