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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

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

  4. A.

    Correct

    B.

    Incorrect

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  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

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  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

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  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

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