Fluid Mechanics Basics Quiz

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Questions and Answers

What is a perfect fluid?

  • A non-existent fluid assumed to have no viscosity or compressibility (correct)
  • A real fluid with high viscosity and compressibility
  • A fluid with compressibility but without viscosity
  • A fluid with viscosity but without compressibility

Why is pressure considered a scalar quantity?

  • Because it depends on the surface area of the object
  • Because it has both magnitude and direction
  • Because it is always positive
  • Because it is proportional to the magnitude of the force (correct)

What is gauge pressure based on?

  • Perfect vacuum
  • Hydraulic pressure
  • Atmospheric pressure (correct)
  • Surface tension

How is the weight of water in the mattress calculated?

<p>By multiplying density, gravity, and volume of water (B)</p> Signup and view all the answers

What distinguishes absolute pressure from gauge pressure?

<p>Reference point (absolute pressure uses perfect vacuum, gauge pressure uses atmospheric pressure) (C)</p> Signup and view all the answers

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