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Chemical Engineering :: Fluid Mechanics

  1. A centrifugal pump used to pump water is used to pump an oil with specific gravity of 0.8 at the same rate. The power consumption will now

  2. A.

     Increase

    B.

     Decrease

    C.

     Remain same

    D.

     Data insufficient to predict

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  3. The Prandtl mixing length is

  4. A.

     Zero at the pipe wall and is a universal constant

    B.

     Independent of radial distance from the pipe axis

    C.

     Independent of the shear stress

    D.

     Useful for computing laminar flow problems

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  5. Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the

  6. A.

     Back flow of fluid in the event of stoppage of pump

    B.

     Discharge pressure

    C.

     Flow of liquid during operation of the pump

    D.

     All of the above

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  7. The unit of velocity head is

  8. A.

     ft-lb/sec

    B.

     ft-lb/ft³

    C.

     ft-lbf/lb

    D.

     ft-lbf/sec

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  9. Which of the following exemplifies a three dimensional fluid flow ?

  10. A.

     Fluid flow at the inlet to a nozzle

    B.

     Fluid flow between parallel plates

    C.

     Viscous fluid flow between converging plates

    D.

     None of these

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  11. The ratio of actual discharge to theoretical discharge through an orifice is equal to

  12. A.

     Cc . Cv

    B.

     Cc . Cd

    C.

     Cv . Cd

    D.

     Cd/Cv

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  13. A differential pressure cell is used for

  14. A.

     Measuring small pressure difference in gases

    B.

     Measuring small pressure difference in liquids

    C.

     Remote recording of pressure difference

    D.

     Measuring the difference of the impact & the static pressure

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  15. In Newton's law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is

  16. A.

     0.44

    B.

     0.044

    C.

     4.4

    D.

     44

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  17. Volume of liquid displaced by a floating body is equivalent to its

  18. A.

     Own weight

    B.

     Submerged weight

    C.

     Own volume

    D.

     Submerged volume

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  19. Euler's equation of motion is a statement expressing

  20. A.

     Conservation of mass

    B.

     Conservation of energy

    C.

     Newton's first law of motion

    D.

     Newton's second law of motion

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