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Home Mechanical Engineering Hydraulics and Fluid Mechanics Comments

  • Question
  • According to equation of continuity,


  • Options
  • A. w1a1 = w2a2
  • B. w1v1 = w2v2
  • C. a1v1 = a2v2
  • D. a1/v1 = a2/v2

  • Correct Answer
  • a1v1 = a2v2 


  • Hydraulics and Fluid Mechanics problems


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    • 1. In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

    • Options
    • A. less than
    • B. more than
    • Discuss
    • 2. The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

    • Options
    • A. Cd x b2gH
    • B. Cd x b2g x H
    • C. Cd x b2g x H3/2
    • D. Cd x b2g x H2
    • Discuss
    • 3. The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly enlarged to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden enlargement is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 4. An ideal fluid is frictionless and incompressible.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 5. In order to measure the flow with a venturimeter, it is installed in

    • Options
    • A. horizontal line
    • B. inclined line with flow upwards
    • C. inclined line with flow downwards
    • D. any direction and in any location
    • Discuss
    • 6. A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

    • Options
    • A. equal to.
    • B. less than
    • C. more than
    • Discuss
    • 7. When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. The pressure measured with the help of a piezometer tube is in

    • Options
    • A. N/mm2
    • B. N/m2
    • C. head of liquid
    • D. all of these
    • Discuss
    • 9. The coefficient of viscosity may be determined by

    • Options
    • A. capillary tube method
    • B. orifice type viscometer
    • C. rotating cylinder method
    • D. all of these
    • Discuss
    • 10. The total energy line lies over the hydraulic gradient line by an amount equal to the

    • Options
    • A. pressure head
    • B. velocity head
    • C. pressure head + velocity head
    • D. pressure head - velocity head
    • Discuss


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