Moody's diagram is used for the determination of:

This question was previously asked in
UKPSC JE Civil 8 May 2022 Official Paper-II
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  1. head loss in pipe flow
  2. discharge (flow rate) in pipe
  3. type of flow
  4. friction factor

Answer (Detailed Solution Below)

Option 4 : friction factor
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Detailed Solution

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Explanation

Moody’s diagram is used to calculate the friction factor of commercial pipes.

It is drawn between friction factor and Reynolds number for various relative roughness.

It is derived for the circular pipe but applicable to other cross-sections as well provided that the diameter is replaced by 4 times the hydraulic radius.

Thus the moody’s chart is a graphical representation between the friction factor, relative roughness, and Reynolds number

F9 Tabrez 12-5-2021 Swati D4

From the above Moody diagram, we can  conclude that:

F9 Tabrez 12-5-2021 Swati D1

  • Curve A represents laminar flow.
  • Curve B and C represent Turbulent flow in the rough pipe.
  • Curve D and E represent turbulent flow in smooth pipe.
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