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Which of the following is NOT an application of flow net?

  • A.Determination of seepage through earthen dam
  • B.Determination of exit gradient
  • C.Determination of hydrostatic pressure
  • D.Determination of passive earth pressure

Answer: D

A flow net is a graphical solution of the Laplace equation for the seepage of water through soil, so it is used to find the seepage quantity (for example beneath a dam or through an earthen dam), the exit gradient, the uplift (hydrostatic) pressure at points and the pore pressure. Passive earth pressure is the resistance of soil to a wall moving against it and is found from Rankine's or Coulomb's theories, not from a flow net, so it is not an application.

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