M

Mr. Dubey • 52.26K Points
Coach

Q. Which among the following is formula for friction factor of circular pipes?

(A) 16/re
(B) 64/re
(C) re/16
(D) re/64
Correct : Option (B)

Explanation:
 circular pipes have a diameter treated in a round manner. for a fluid flow which is laminar head loss is directly proportional to the fluid velocity. thus, friction factor is inversely proportional to its velocity. therefore, the correct option is ‘64/re’.

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