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Chemical Engineering :: Fluid Mechanics

  1. Poise is converted into stoke by

  2. A.
    multiplying with density (gm/c.c).
    B.
    dividing by density (gm/c.c).
    C.
    multiplying with specific gravity.
    D.
    dividing by specific gravity.

  3. The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop fo __________ fluid.

  4. A.
    dilatant
    B.
    pseudoplastic
    C.
    Bingham plastic
    D.
    Newtonion

  5. Kinetic energy of fluid per unit weight represented by the velocity head is given by

  6. A.
    2v2/gc
    B.
    v2/2gc
    C.
    ρv2/gc
    D.
    ρ.v2/2gc

  7. At a constant speed of the centrifugal pump . it __________ the impeller diameter.

  8. A.
    capacity varies directly with
    B.
    head varies as the square of
    C.
    horsepower varies as the cube of
    D.
    all (a), (b) and (c)

  9. The pressure co-efficient is the ratio of pressure forces to __________ forces.

  10. A.
    viscous
    B.
    inertial
    C.
    gravity
    D.
    surface tension

  11. Vena-contracta formed during flow of a liquid through an orificemeter has

  12. A.
    minimum liquid cross-section.
    B.
    more diameter compared to orifice diameter.
    C.
    minimum velocity of fluid stream.
    D.
    none of these.

  13. Pick out the Blake-Plummer equation (valid for large NRe) for fluid flow through beds of solids.


  14. As per Newton's law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to(where, μ = fluid viscosity)

  15. A.
    1/μ
    B.
    μ
    C.
    μ2
    D.
    1/μ2

  16. Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.

  17. A.
    increase
    B.
    decrease
    C.
    not change
    D.
    exponentially decrease

  18. In continuous fluidisation

  19. A.
    solids are completely entrained.
    B.
    the pressure drop is less than that for batch fluidisation.
    C.
    there is no entrainment of solids.
    D.
    velocity of the fluid is very small.