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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. A flow is called sonic, if the Mach number is unity.

  2. A.

    Agree

    B.

    Disagree


  3. An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,

  4. A.

    1%

    B.

    1.5%

    C.

    2%

    D.

    2.5%


  5. A flow through a long pipe at decreasing rate is called __________ uniform flow.

  6. A.

    steady

    B.

    unsteady


  7. The surface tension of mercury at normal temperature is __________ that of water.

  8. A.

    same as

    B.

    lower than

    C.

    higher than