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Chemical Engineering :: Fluid Mechanics

  1. In area meter (e.g., rotameter), with increase in the fluid flow rate, the

  2. A.
    pressure drop increases linearly.
    B.
    pressure drop is almost constant.
    C.
    area through which fluid flows does not vary.
    D.
    none of these.

  3. Drag co-officient CD, in Stoke's law range is given by


  4. In power law, , then the fluid is

  5. A.
    Newtonian
    B.
    dilatant
    C.
    thixotropic
    D.
    rheopectic

  6. The buoyant force acting on a floating body is dependent on the

  7. A.
    viscosity of the liquid.
    B.
    weight of the liquid displaced.
    C.
    depth of immersion of the body.
    D.
    surface tension of the liquid.

  8. A Newtonion fluid is that

  9. A.
    which follows Newton's law of motion.
    B.
    which needs a minimum shear, before it starts deforming.
    C.
    for which shear & deformation are related as
    D.
    none of these.

  10. In case of end to end connection of two or more pipes in series, the __________ each pipe.

  11. A.
    same rate of flow passes through
    B.
    head loss is same through
    C.
    rate of flow in each pipe is proportional to the length of
    D.
    total flow rate is the sum of flow rate in

  12. Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number ?

  13. A.
    Fanning equation
    B.
    Blake-Pllummer equation
    C.
    Hagen-Poiseulle equation
    D.
    Kozney-Karman equation

  14. The flow of gas along a pipe in the direction of decreasing pressure causes decrease in its

  15. A.
    viscosity
    B.
    specific volume
    C.
    velocity
    D.
    none of these

  16. Centrifugal pump can't be used to pump

  17. A.
    molten sodium (used as a coolant in Fast Breeder Reactor).
    B.
    moderately viscous vegetable oil used in soap industry.
    C.
    thick molten soap at 80°C.
    D.
    none of the above.

  18. A stream line is

  19. A.
    fixed in space in steady flow.
    B.
    always the path of particle.
    C.
    drawn normal to the velocity vector at every point.
    D.
    a line connecting the mid points of flow cross-section.