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  • Question

  • The viscosity of water at 20°C is


  • Options
  • A. one stoke
  • B. one centistroke
  • C. one poise
  • D. one centipoise

  • Correct Answer
  • one centipoise 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, ? = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. A fluid having no viscosity is known as

    • Options
    • A. real fluid
    • B. ideal fluid
    • C. newtonian fluid
    • D. non-newtonian fluid
      • Discuss
    • 3. The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.

    • Options
    • A. same as
    • B. less than
    • C. more than
      • Discuss
    • 4. The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

    • Options
    • A. 2gH
    • B. H2g
    • C. 2gH
    • D. 2gH
      • Discuss
    • 6. The pressure of air __________ with the increase of height from the surface of the earth.

    • Options
    • A. does not change
    • B. decreases
    • C. increases
      • Discuss
    • 7. A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 8. According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

    • Options
    • A. A x M x m1/2 x i2/3
    • B. A x M x m2/3 x i1/2
    • C. A1/2 x M2/3 x m x i
    • D. A2/3 x M1/3 x m x i
      • Discuss
    • 9. The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.

    • Options
    • A. equal
    • B. directly proportional
    • C. inversely proportional
      • Discuss
    • 10. The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.

    • Options
    • A. less than
    • B. more than
      • Discuss

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