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An incompressible flow is one in which

  • A.Velocity is treated as constant
  • B.Density is treated as constant
  • C.Pressure is treated as constant
  • D.Temperature is treated as constant

Answer: B

The assumption is about density alone, and it is a property of the FLOW rather than of the fluid: air is compressible, but air moving slowly enough behaves as though it were not. Pressure and velocity vary freely under the assumption.

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