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  • Question

  • 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

  • Correct Answer
  • False 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. 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
    • 2. According to equation of continuity,

    • Options
    • A. w1a1 = w2a2
    • B. w1v1 = w2v2
    • C. a1v1 = a2v2
    • D. a1/v1 = a2/v2
      • Discuss
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. Euler's equation in the differential form for the motion of liquids is given by

    • Options
    • A.
    • B.
    • C. ?.dp + g.dz + v.dv = 0
    • D. ?.dp - g.dz + v.dv = 0
      • Discuss
    • 10. The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

    • Options
    • A. equal to
    • B. less than
    • C. more than
      • Discuss

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