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Hydraulics and Fluid Mechanics problems

  • 1. A flow in which __________ force is dominating over the viscosity is called turbulent flow.

  • Options
  • A. elastic
  • B. surface tension
  • C. viscous
  • D. inertia
    • Discuss
  • 2. When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.

  • Options
  • A. Agree
  • B. Disagree
    • Discuss
  • 3. Which of the following statement is wrong?

  • Options
  • A. A flow whose streamline is represented by a curve, is called two dimensional flow.
  • B. The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy.
  • C. The length of divergent portion in a venturimeter is equal to the convergent portion.
  • D. A pitot tube is used to measure the velocity of flow at the required point in a pipe.
    • Discuss
  • 4. The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

  • Options
  • A. 0.855 a2gH
  • B. 1.855 aH2g
  • C. 1.585 a2gH
  • D. 5.85 aH2g
    • Discuss
  • 5. The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.

  • Options
  • A. Agree
  • B. Disagree
    • Discuss
  • 6. In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.

  • Options
  • A. Correct
  • B. Incorrect
    • Discuss
  • 7. A flow through a long pipe at constant rate is called

  • Options
  • A. steady uniform flow
  • B. steady non-uniform flow
  • C. unsteady uniform flow
  • D. unsteady non-uniform flow
    • Discuss
  • 8. The Francis formula for the discharge over Cippoletti weir is

  • Options
  • A. 1.84 LH1/2
  • B. 1.84 LH
  • C. 1.84 LH3/2
  • D. 1.84 LH5/2
    • Discuss
  • 9. A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called turbulent flow.

  • Options
  • A. Agree
  • B. Disagree
    • Discuss
  • 10. The Euler's equation for the motion of liquids is based upon the assumption that

  • Options
  • A. the fluid is non - viscous, homogeneous and incompressible
  • B. the velocity of flow is uniform over the section
  • C. the flow is continuous, steady and along the stream line
  • D. all of the above
    • Discuss

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