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Chemical Engineering :: Fluid Mechanics

  1. Cocks are used to control

  2. A.
    water
    B.
    any liquid
    C.
    solids
    D.
    none of these

  3. If in a flow field, between any two points, then the flow must be

  4. A.
    steady, incompressible, irrotational.
    B.
    steady, compressible, irrotational.
    C.
    steady, compressible and along a streamline.
    D.
    unsteady, incompressible, irrotational.

  5. The dimension of surface tension is

  6. A.
    ML-2
    B.
    MT-2
    C.
    MLT-2
    D.
    ML-2T

  7. Pick out the correct statement.

  8. A.
    Fanning friction factor is inversely proportional to Reynolds number always.
    B.
    The property of a randomly packed bed (with raschig rings) is given by the ratio of the total volume to the volume of voids in the bed.
    C.
    Mach number in an incompressible fluid is always unity.
    D.
    Mach number is given by the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow.

  9. The friction factor is

  10. A.
    always inversely proportional to the Reynolds number.
    B.
    not dimensionless.
    C.
    not dependent on the roughness of the pipe.
    D.
    none of these.

  11. Rubber latex is an example of a __________ .fluid.

  12. A.
    pseudoplastic
    B.
    bingham plastic
    C.
    dilatent
    D.
    Newtonion

  13. Which of the following factors does not contribute to the pressure drop in a pipeline ?

  14. A.
    Velocity of fluid
    B.
    Size of pipe
    C.
    Length of pipe and number of bends
    D.
    None of these

  15. 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

  16. A.
    evaporation
    B.
    cavitation
    C.
    sublimation
    D.
    stripping

  17. Working of a __________ pump characterises mixed flow.

  18. A.
    turbine
    B.
    piston
    C.
    diaphragm
    D.
    none of these

  19. The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides 'x' & 'y' is given by