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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The discharge over a rectangular weir, considering the velocity of approach, is (where H1 = Total height of water above the weir = H + Ha H = Height of water, over the crest of the weir, and Ha = Height of water, due to velocity of approach)

  2. A.

    \(\frac { 2} { 3 }\)Cd x L\(\sqrt{2g}\)[H1 - Ha]

    B.

     \(\frac { 2} { 3 }\)Cd x L\(\sqrt{2g}\)[H13/2 - Ha3/2]

    C.

      \(\frac { 2} { 3 }\)Cd x L\(\sqrt{2g}\)[H12 - Ha2]

    D.

       \(\frac { 2} { 3 }\)Cd x L\(\sqrt{2g}\)[H15/2 - Ha5/2]


  3. A flow in which __________ force is dominating over the viscosity is called turbulent flow.

  4. A.

    elastic

    B.

    surface tension

    C.

    viscous

    D.

    inertia


  5. If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.

  6. A.

    True

    B.

    False


  7. The atmospheric pressure at sea level is

  8. A.

    103 kN/m2

    B.

    10.3 m of water

    C.

    760 mm of mercury

    D.

    all of these


  9. When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.

  10. A.

    Agree

    B.

    Disagree