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Hydraulics and Fluid Mechanics problems

  • 1. According to equation of continuity,

  • Options
  • A. w1a1 = w2a2
  • B. w1v1 = w2v2
  • C. a1v1 = a2v2
  • D. a1/v1 = a2/v2
    • Discuss
  • 2. 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
  • 3. 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
  • 4. 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
  • 5. 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
  • 6. 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
  • 7. 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
  • 8. 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
  • 9. The kinematic viscosity is the

  • Options
  • A. ratio of absolute viscosity to the density of the liquid
  • B. ratio of density of the liquid to the absolute viscosity
  • C. product of absolute viscosity and density of the liquid
  • D. product of absolute viscosity and mass of the liquid
    • Discuss
  • 10. The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and Cd = Coefficient of discharge)

  • Options
  • A. Q = Cd x b2g(H2 - H1)
  • B. Q = Cd x b2g(H21/2 - H11/2)
  • C. Q = Cd x b2g(H23/2 - H13/2)
  • D. Q = Cd x b2g(H22 - H12)
    • Discuss

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