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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME - section-1
  1. The Euler's equation for the motion of liquids is based upon the assumption that

    2. A.

     The fluid is non - viscous, homogeneous and incompressible
    B.

     The velocity of flow is uniform over the section
    C.

     The flow is continuous, steady and along the stream line
    D.

     All of the above

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  2. The Bernoulli's equation is based on the assumption that

    3. A.

     There is no loss of energy of the liquid flowing
    B.

     The velocity of flow is uniform across any cross-section of the pipe
    C.

     No force except gravity acts on the fluid
    D.

     All of the above

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  3. The atmospheric pressure at sea level is

    4. A.

     103 kN/m2
    B.

     10.3 m of water
    C.

     760 mm of mercury
    D.

     All of these

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  4. The line of action of the buoyant force acts through the Centroid of the

    5. A.

     Submerged body
    B.

     Volume of the floating body
    C.

     Volume of the fluid vertically above the body
    D.

     Displaced volume of the fluid

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  5. The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

    6. A.

     4μvl/wd²
    B.

     8μvl/wd²
    C.

     16μvl/wd²
    D.

     32μvl/wd²

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  6. The pressure measured with the help of a pressure gauge is called

    7. A.

     Atmospheric pressure
    B.

     Gauge pressure
    C.

     Absolute pressure
    D.

     Mean pressure

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  7. A fluid is said to be ideal, if it is

    8. A.

     Incompressible
    B.

     Viscous and incompressible
    C.

     Inviscous and compressible
    D.

     Inviscous and incompressible

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  8. The dynamic viscosity of the liquid __________ with rise in temperature.

    9. A.

     Remain unaffected
    B.

     Increases
    C.

     Decreases
    D.

     None of these

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  9. The dynamic viscosity of gases __________ with rise in temperature.

    10. A.

     Remain unaffected
    B.

     Increases
    C.

     Decreases
    D.

     None of these

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  10. The overall efficiency of a reaction turbine is the ratio of

    11. A.

     Power produced by the turbine to the energy actually supplied by the turbine
    B.

     Actual work available at the turbine to the energy imparted to the wheel
    C.

     Work-done on the wheel to the energy (or head of water) actually supplied to the turbine
    D.

     None of the above

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