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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The pressure of air __________ with the increase of height from the surface of the earth.

  2. A.

    does not change

    B.

    decreases

    C.

    decreases


  3. The sheet of water flowing over a notch or a weir is known as

  4. A.

    sill or crest

    B.

    nappe or vein

    C.

    orifice

    D.

    none of these


  5. A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity.

  6. A.

    Agree

    B.

    Disagree


  7. A flow in which the quantity of liquid flowing per second is not constant, is called

  8. A.

    streamline flow

    B.

    turbulent flow

    C.

    steady flow

    D.

    unsteady flow


  9. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.

  10. A.

    True

    B.

    False