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  • Question
  • In fluid flow, cavitation is caused, if the


  • Options
  • A. fluid velocity decreases to zero.
  • B. total energy decreases.
  • C. both (a) and (b).
  • D. flow pressure approaches its vapor pressure at the prevailing temperature.

  • Correct Answer
  • flow pressure approaches its vapor pressure at the prevailing temperature. 


  • Fluid Mechanics problems


    Search Results


    • 1. Dimension of surface tension is(where, F = force, L = length)

    • Options
    • A. FL-1
    • B. F-1 . L
    • C. F.L-2
    • D. F-2 . L
    • Discuss
    • 2. Which of the following is not a dimension-less parameter?

    • Options
    • A. Euler number
    • B. Specific gravity
    • C. Fanning friction factor
    • D. None of these
    • Discuss
    • 3. Schedule number of a pipe, which is a measure of its wall thickness, is given by

    • Options
    • A. 1000 P'/S
    • B. 100 P'/S
    • C. 1000 S/P'
    • D. 10000 P'/S
    • Discuss
    • 4. Which of the following denotes the effect of compressibility in fluid flow?

    • Options
    • A. Weber number
    • B. Mach number
    • C. Euler number
    • D. Reynolds number
    • Discuss
    • 5. The dimension of dynamic viscosity is

    • Options
    • A. ML-1T-1
    • B. L2T-1
    • C. LT-2
    • D. ML-1T-2
    • Discuss
    • 6. Head developed by a centrifugal pump depends on its

    • Options
    • A. speed
    • B. impeller diameter
    • C. both (a) and (b)
    • D. neither (a) nor (b)
    • Discuss
    • 7. All pipes of a particular nominal size have the same

    • Options
    • A. inside diameter
    • B. outside diameter
    • C. thickness
    • D. none of these
    • Discuss
    • 8. At high Reynolds number

    • Options
    • A. inertial forces control and viscous forces are unimportant.
    • B. viscous forces predominate.
    • C. inertial forces are unimportant and viscous forces control.
    • D. none of these.
    • Discuss
    • 9. Water hammer in a pipeline results from the

    • Options
    • A. bursting of pipelines due to closure by a valve.
    • B. rapid pressure change due to a rapid change in the rate of flow.
    • C. pressure increase due to closure of a valve resulting in decrease in rate of flow.
    • D. none of these.
    • Discuss
    • 10. Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.

    • Options
    • A. 2 to 3
    • B. 0.01 to 0.10
    • C. 200 to 300
    • D. 100 to 1000
    • Discuss


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