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Fluid Mechanics

Q1: If Blausius or Darcey friction factor is 'f1' then the Fanning friction factor is equal to

A f1/4

B 4f2

C 2f1

D f1/2

ANS:A - f1/4

The Blasius or Darcy friction factor, often denoted as f1f_1f1​, is related to the Fanning friction factor fff by the following relationship: f=f14f = \frac{f_1}{4}f=4f1​​ Therefore, if the Blasius or Darcy friction factor is f1f_1f1​, then the Fanning friction factor fff is equal to f14\frac{f_1}{4}4f1​​. So, the correct answer is: f=f14f = \frac{f_1}{4}f=4f1​​



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