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Chemical Engineering :: Fluid Mechanics

  1. The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s).

  2. A.
    24000
    B.
    24
    C.
    0.24
    D.
    0.44

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  3. For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter)

  4. A.
    Vs/Dp2
    B.
    Vs2/Dp2
    C.
    Vs2/Dp3
    D.
    Vs/Dp3

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

  6. A.
    10
    B.
    100
    C.
    250
    D.
    1000

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  7. Dimension of surface tension is(where, F = force, L = length)

  8. A.
    FL-1
    B.
    F-1 . L
    C.
    F.L-2
    D.
    F-2 . L

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  9. Which of the following is not a dimension-less parameter ?

  10. A.
    Euler number
    B.
    Specific gravity
    C.
    Fanning friction factor
    D.
    None of these

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  11. Co-efficient of velocity is __________ the coefficient of discharge.

  12. A.
    less than
    B.
    more than
    C.
    equal to
    D.
    not related to

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  13. All pipes of a particular nominal size have the same

  14. A.
    inside diameter
    B.
    outside diameter
    C.
    thickness
    D.
    none of these

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  15. For the transfer of solution of thick slurry, the pump used is a __________ pump.

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

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  17. Which of the following is not concerned with the fluid-particle interaction ?

  18. A.
    Drag co-efficient
    B.
    Froude number
    C.
    Galileo number
    D.
    Weber number

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  19. Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be __________ ft.

  20. A.
    40
    B.
    34
    C.
    8
    D.
    37

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