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Chemical Engineering :: Fluid Mechanics

  1. Bernoulli's equation is not applicable, when the flow is

  2. A.
    irrotational.
    B.
    incompressible.
    C.
    viscous.
    D.
    all (a), (b) & (c).

  3. The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)

  4. A.
    x
    B.
    πx
    C.
    2x
    D.
    x/2

  5. Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid

  6. A.
    lies above the centroid of the plane surface.
    B.
    is independent of the specific weight of the fluid.
    C.
    is different for different fluids.
    D.
    is at the centroid of the plane surface.

  7. Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.

  8. A.
    shear stress
    B.
    shear force
    C.
    average drag per unit projected area
    D.
    none of these

  9. Creeping flow around a sphere is defined, when particle Reynolds number is

  10. A.
    < 2100
    B.
    < 0.1
    C.
    > 2.5
    D.
    < 500

  11. Open channel liquid flow is most conveniently measured by a

  12. A.
    hot wire anemometer
    B.
    notch
    C.
    rotameter
    D.
    segmental orifice

  13. Toothpaste is a

  14. A.
    Bingham plastic
    B.
    pseudoplastic
    C.
    Newtonion liquid
    D.
    dilatent

  15. Slurries can be most conveniently pumped by a __________ pump.

  16. A.
    screw
    B.
    reciprocating
    C.
    gear
    D.
    centrifugal

  17. Volute type of casing is provided in a centrifugal pump to

  18. A.
    convert velocity head to pressure head.
    B.
    convert pressure head to velocity head,
    C.
    reduce the discharge fluctuation.
    D.
    increase the discharge.

  19. Each term of the Bernoulli's equation written in the form, , represents the total energy per unit

  20. A.
    mass
    B.
    volume
    C.
    specific weight
    D.
    none of these