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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

  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

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

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

  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

  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

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

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

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

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

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

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

  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

  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