Home / Mechanical Engineering / Hydraulics and Fluid Mechanics :: Section 3

Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.

  2. A.

    equal to

    B.

    one-fourth

    C.

    one-third

    D.

    one-half


  3. Viscous force is the __________ of shear stress due to viscosity and cross-sectionar area of flow.

  4. A.

    sum

    B.

    different

    C.

    product

    D.

    ratio


  5. The density of air is same at different heights.

  6. A.

    Correct.

    B.

    Incorrect


  7. The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

  8. A.

    w.A

    B.

    wx

    C.

    wAx

    D.

    wA/x


  9. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.

  10. A.

    True

    B.

    False