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Chemical Engineering :: Fluid Mechanics

  1. The exit cone angle in case of a standard venturimeter is __________ the entrance cone angle.

  2. A.

     Smaller than

    B.

     Greater than

    C.

     Equal to

    D.

     Either A or B


  3. Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.

  4. A.

     5

    B.

     50

    C.

     500

    D.

     1000


  5. The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter.

  6. A.

     0.25

    B.

     0.5

    C.

     0.66

    D.

     0.95


  7. Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.

  8. A.

     0.5

    B.

     5

    C.

     50

    D.

     100


  9. The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.

  10. A.

     Size

    B.

     Surface properties

    C.

     Both A and B

    D.

     Neither A nor B


  11. Power loss in an orificemeter is __________ that in a venturimeter.

  12. A.

     Less than

    B.

     Same as

    C.

     More than

    D.

     Data insufficient, cannot be predicted


  13. The terminal velocity of a particle moving through a fluid varies as dpn. The value of n is equal to __________ in Stoke's law regime.

  14. A.

     1

    B.

     0.5

    C.

     2

    D.

     1.5


  15. For the production of very high vacuum, a __________ pump is normally used.

  16. A.

     Diffusion

    B.

     Centrifugal

    C.

     Jet ejector

    D.

     Piston


  17. Drag co-efficient in hindered settling is __________ that in free settling.

  18. A.

     Less than

    B.

     Equal to

    C.

     Not necessarily greater than

    D.

     Always greater than


  19. Centre of pressure in an immersed body is __________ the centre of gravity.

  20. A.

     Above

    B.

     Below

    C.

     At

    D.

     Either above or below; depends on the liquid density