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  • Question

  • When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress When two layers of a fluid separated by dy move over the other with a difference of velocity dv, cau, where ? is known as


  • Options
  • A. coefficient of viscosity
  • B. absolute viscosity
  • C. dynamic viscosity
  • D. viscosity
  • E. all the above.

  • Correct Answer
  • all the above. 

    • Hydraulics problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. A piezometer opening in pipes measures

    • Options
    • A. velocity head
    • B. static pressure
    • C. total pressure
    • D. negative static pressure.
      • 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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