Fluid Mechanics: Flow Types and Characteristics
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Questions and Answers

What is the characteristic of an ideal fluid?

  • It has viscosity and no shear stresses occur
  • It has viscosity and shear stresses occur
  • It has zero viscosity and shear stresses occur
  • It has zero viscosity and no shear stresses occur (correct)

What type of flow has a velocity that only depends on one coordinate?

  • Uniform flow
  • One-dimensional flow (correct)
  • Three-dimensional flow
  • Two-dimensional flow

What is non-uniform flow characterized by?

  • Velocity that changes at different positions (correct)
  • Velocity that is constant at different positions
  • Velocity that is constant in a circular pipe
  • Velocity that depends on one coordinate

In which type of flow does the velocity vary in three dimensions?

<p>Three-dimensional flow (A)</p> Signup and view all the answers

What is the buoyant force on an object equal to, according to Archimedes' Principle?

<p>The weight of the fluid displaced by the object (A)</p> Signup and view all the answers

What characterizes a flow field?

<p>Its velocity distribution (A)</p> Signup and view all the answers

What is the characteristic of liquids in terms of compressibility?

<p>They are nearly incompressible (B)</p> Signup and view all the answers

Under what conditions can the flow of a gas be considered incompressible?

<p>When the density of the gas remains constant (C)</p> Signup and view all the answers

What is the main difference between compressible and incompressible flow?

<p>One has a constant density and the other has a changing density (D)</p> Signup and view all the answers

Which of the following is an example of an incompressible fluid?

<p>Water (A)</p> Signup and view all the answers

What happens to the density of a fluid in an incompressible flow?

<p>It remains almost constant (A)</p> Signup and view all the answers

What is the characteristic of a gas in terms of compressibility?

<p>It is highly compressible (C)</p> Signup and view all the answers

What is the unit of mass flow rate?

<p>kg/s (C)</p> Signup and view all the answers

What is the primary factor affecting the formation of vortices behind a moving object?

<p>Velocity of the object (A)</p> Signup and view all the answers

What is the dimensionless group that represents the ratio of inertial forces to viscous forces?

<p>Reynolds number (B)</p> Signup and view all the answers

What is the relationship between head loss in a pipe and the length of the pipe?

<p>Directly proportional (A)</p> Signup and view all the answers

What is the effect of surface roughness on head loss in a pipe?

<p>Increases head loss (C)</p> Signup and view all the answers

What is the relationship between head loss and velocity in a pipe?

<p>Proportional to the square of velocity (C)</p> Signup and view all the answers

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