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
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✅ Correct Answer: (B) 64/re
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’.

Published by Mr. Dubey ⭐ 109.99K Points at 19-Sep-2023 08:23 pm in Fluid Mechanics and Machinery

Explanation by: Mr. Dubey
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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