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Hydraulics and Fluid Mechanics problems

  • 1. 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
  • 2. When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

  • Options
  • A. 0.5 a2gH
  • B. 0.707 a2gH
  • C. 0.855 a2gH
  • D. a2gH
    • Discuss
  • 3. A piezometer tube is used only for measuring

  • Options
  • A. low pressure
  • B. high pressure
  • C. moderate pressure
  • D. vacuum pressure
    • Discuss
  • 4. A venturiflume is a flumed structure constructed across a channel by restricting its width.

  • Options
  • A. True
  • B. False
    • Discuss
  • 5. The velocity corresponding to Reynold number of 2000 is called

  • Options
  • A. sub-sonic velocity
  • B. super-sonic velocity
  • C. lower critical velocity
  • D. higher critical velocity
    • Discuss
  • 6. The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

  • Options
  • A. equal to
  • B. less than
  • C. more than
    • Discuss
  • 7. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.

  • Options
  • A. Correct
  • B. Incorrect
    • Discuss
  • 8. Select the correct statement

  • Options
  • A. Weber's number is the ratio of inertia force to elastic force.
  • B. Weber's number is the ratio of gravity force to surface tension force.
  • C. Weber's number is the ratio of viscous force to pressure force.
  • D. Weber's number is the ratio of inertia force to surface tension force.
    • Discuss
  • 9. The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

  • Options
  • A. less than
  • B. more than
    • Discuss
  • 10. Euler's number is the ratio of __________ force to pressure force.

  • Options
  • A. inertia
  • B. gravity
  • C. viscous
    • Discuss

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