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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

  2. A.

    \(\frac { v^2 } { 2g }\)

    B.

    \(\frac {0.5 v^2 } { 2g }\)

    C.

    \(\frac { 0.375 v^2 } { 2g }\)

    D.

    \(\frac { 0.75 v^2 } { 2g }\)


  3. When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

  4. A.

    0.5 \(a \sqrt{2gH}\)

    B.

    0.707 \(a \sqrt{2gH}\)

    C.

    0.855 \(a \sqrt{2gH}\)

    D.

    \(a \sqrt{2gH}\)


  5. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.

  6. A.

    Yes

    B.

    No


  7. Water is __________ liquid.

  8. A.

    a compressible

    B.

    an incompressible


  9. With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

  10. A.

    decrease

    B.

    increase

    C.

    remain unchanged

    D.

    depend upon the characteristics of liquid