Home / Chemical Engineering / Fluid Mechanics :: Section-17

Chemical Engineering :: Fluid Mechanics

  1. The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as

  2. A.

     Evaporation

    B.

     Cavitation

    C.

     Sublimation

    D.

     Stripping


  3. The maximum delivery pressure of compressors can be upto __________ atmospheres.

  4. A.

     10

    B.

     100

    C.

     250

    D.

     1000


  5. A centrifugal pump has the following specifications:
    Power = 4 H.P.; Speed = 800 rpm
    Head = 8 metres
    Flow = 1000 litres/minutes.
    If its speed is halved, then the new head will be __________ metres.

  6. A.

     2

    B.

     4

    C.

     8

    D.

     5.5


  7. A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.

  8. A.

     17

    B.

     42

    C.

     84

    D.

     1.8


  9. Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of

  10. A.

     Powder & grannular solids

    B.

     Liquids

    C.

     Low melting point semi-solids

    D.

     All of the above


  11. Discharge from a 24 inch pipe of water at 10 ft/sec will be __________ ft³/sec.

  12. A.

     7.65

    B.

     32.36

    C.

     48.22

    D.

     125.6


  13. Minimum fluidisation velocity for a specific system depends upon the

  14. A.

     Particle size

    B.

     Fluid viscosity

    C.

     Density of both the particle & the fluid

    D.

     All of the above


  15. The ratio of width to depth for the most economical rectangular section in open channel flow is

  16. A.

     0.5

    B.

     1

    C.

     1.5

    D.

     2


  17. Drag is defined as the force exerted by the

  18. A.

     Fluid on the solid in a direction opposite to flow

    B.

     Fluid on the solid in the direction of flow

    C.

     Solid on the fluid

    D.

     None of these


  19. Slugging in a fluidised bed can be avoided by using

  20. A.

     Tall narrow vessel

    B.

     Deep bed of solids

    C.

     Shallow beds of solids and proper choice of particle size

    D.

     Very large particles