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Home / Mechanical Engineering / Hydraulics and Fluid Mechanics :: Section 6

Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. 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)

  2. A.

    IGA¯x¯x

    B.

    IG¯xA¯x

    C.

    A¯xIG+¯x

    D.

    IGA¯x+¯x


  3. The velocity at which the turbulent flow starts is known as higher critical velocity.

  4. A.

    Yes

    B.

    No


  5. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

  6. A.

    23Cd(L - nH2gH

    B.

     23Cd(L - 0.1nH2gH32

    C.

    D.


  7. The specific weight is also known as weight density.

  8. A.

    Correct

    B.

    Incorrect


  9. In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

  10. A.

    Psina

    B.

    2Psina

    C.

    P / 2sinα

    D.

    2Psina/2