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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

  2. A.

    tan θ = a/g

    B.

    tan θ = 2 a/g

    C.

    tan θ = a/2g

    D.

    tan θ = a2/2g

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  3. The discharge over a triangular notch is

  4. A.

    inversely proportional to H3/2

    B.

    directly proportional to H3/2

    C.

    inversely proportional to H5/2

    D.

    directly proportional to H5/2

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  5. The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

  6. A.

    0.855 \(\sqrt{2gh}\)

    B.

    1.855 aH \(\sqrt{2g}\)

    C.

    1.585 a\(\sqrt{2gh}\)

    D.

    5.85 aH\(\sqrt{2g}\)

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  7. The loss of pressure head in case of laminar flow is proportional to

  8. A.

    velocity

    B.

    (velocity)2

    C.

    (velocity)3

    D.

    (velocity)4

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  9. The flow of water through the hole in the bottom of a wash basin is an example of

  10. A.

    steady flow

    B.

    uniform flow

    C.

    free vortex

    D.

    forced vortex

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