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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The unit of surface tension is

  2. A.

    N/m

    B.

    N/m2

    C.

    N/m3

    D.

    N-m


  3. A notch is, usually, made of a metallic plate.

  4. A.

    Correct

    B.

    Incorrect


  5. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.

  6. A.

    True

    B.

    False


  7. A channel is said to be of most economical cross-section, if

  8. A.

    it gives maximum discharge for a given cross-sectional area and bed slope

    B.

    it has minimum wetted perimeter

    C.

    it involves lesser excavation for the designed amount of discharge

    D.

    all of the above


  9. The top of the weir over which the water flows is known as

  10. A.

    sill or crest

    B.

    nappe or vein

    C.

    orifice

    D.

    none of these