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  • Question

  • 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

  • Correct Answer
  • Correct 

    • Hydraulics and Fluid Mechanics problems

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    • 1. The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 2. 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
    • 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. 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
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.

    • Options
    • A. True
    • B. False
      • Discuss

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