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Hydraulics problems

  • 1. The thickness of a sharp crested weir is kept less than

  • Options
  • A. one-third of the height of water on the sill
  • B. one-half of the height of water on the sill
  • C. one-fourth of the height of water on the sill
  • D. two-third of the height of water on the sill
  • E. none of these.
    • Discuss
  • 2. An ideal flow of a liquid obeys

  • Options
  • A. Continuity equation
  • B. Newton's law of viscosity
  • C. Newton's second law of motion
  • D. dynamic viscosity law,
    • Discuss
  • 3. A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 4. The shear stress distribution in viscous fluid through a circular pipe is :

  • Options
  • A. maximum at the centre
  • B. maximum at the inside of surface
  • C. same throughout the section
  • D. none of these.
    • Discuss
  • 5. When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress Civil Engineering Hydraulics: When two layers of a fluid separated by dy move over the other with a difference of velocity , where ? is known as

  • Options
  • A. coefficient of viscosity
  • B. absolute viscosity
  • C. dynamic viscosity
  • D. viscosity
  • E. all the above.
    • Discuss
  • 6. The time required to close a valve gradually is (where L is the length of pipe and C = velocity of pressure wave)

  • Options
  • A.
  • B. ?
  • C. >
  • D. <
    • Discuss
  • 7. The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 8. Reynold number is the ratio of initial force and

  • Options
  • A. viscosity
  • B. elasticity
  • C. gravitational force
  • D. surface tension.
    • Discuss
  • 9. The momentum correction factor (?) for the viscous flow through a circular pipe is

  • Options
  • A. 1.25
  • B. 1.33
  • C. 1.50
  • D. 1.66
  • E. 2.00
    • Discuss
  • 10. If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is

  • Options
  • A. 400 H.P.
  • B. 450 H.P.
  • C. 500 H.P.
  • D. 550 H.P.
    • Discuss

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