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Chemical Engineering :: Fluid Mechanics

  1. Fluid flow through a packed bed is represented by the __________ equation.

  2. A.

     Fanning's

    B.

     Ergun's

    C.

     Hagen-Poiseuille's

    D.

     None of these


  3. Volute of a centrifugal pump should be designed in a fashion, such that the

  4. A.

     Kinetic head gets converted into static head

    B.

     Moving stream gradually reduces velocity

    C.

     Mean velocity remains constant

    D.

     None of these


  5. In hindered settling, the particles are

  6. A.

     Placed farther from the wall

    B.

     Not affected by other particles and the wall

    C.

     Near each other

    D.

     None of these


  7. The main factor on which the behaviour of a mass of fluidised solid depends mainly is the

  8. A.

     Fluid characteristics

    B.

     Particle size

    C.

     Both A and B

    D.

     Neither A nor B


  9. For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is

  10. A.

     More

    B.

     Less

    C.

     Equal

    D.

     More or less, depending on the type of particle


  11. Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation?

  12. A.

     Decrease in effect

    B.

     Increase in thrust

    C.

     Develops noise

    D.

     Develops high pressure


  13. An equipotential line is __________ to the velocity vector at every point.

  14. A.

     Normal

    B.

     Normal

    C.

     Tangential

    D.

     None of these


  15. Steady non-uniform flow is exemplified by flow through a/an

  16. A.

     Long pipe at constant rate

    B.

     Long pipe at decreasing rate

    C.

     Expanding tube at increasing rate

    D.

     Expanding tube at constant rate


  17. Pressure drop in packed bed for turbulent flow is given by the __________ equation.

  18. A.

     Kozney-Karman

    B.

     Blake-Plummer

    C.

     Leva's

    D.

     Hagen-Poiseulle's


  19. Pressure drop in a packed bed for laminar flow is given by the __________ equation.

  20. A.

     Kozney-Karman

    B.

     Blake-Plummer

    C.

     Leva's

    D.

     Fanning friction factor