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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

  2. A.

    equal to

    B.

    less than

    C.

    more than

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  3. If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

  4. A.

    neutral equilibrium

    B.

    stable equilibrium

    C.

    unstable equilibrium

    D.

    none of these

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  5. The pressure measured with the help of a piezometer tube is in

  6. A.

    N/mm2

    B.

    N/m2

    C.

    head of liquid

    D.

    all of these

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  7. The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

  8. A.

    w x Q x H

    B.

    w x Q x hf

    C.

    w x Q (H - hf)

    D.

    w x Q (H + hf)

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  9. In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

  10. A.

    less than

    B.

    more than

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