A Best Way To Crack Gorenment Job Exams

Biochemical Engineering Objective Questions { Sterilization }



8. The deviation from ideal plug flow due to axial mixing can be described by the
A.dispersion model
B.Langmuir model
C.Friedlander model
D.Pasceri model
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9. The collection efficiency by diffusion increases with
A.decreasing particle size
B.decreasing air velocity
C.both (a) and (b)
D.increasing particle size
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10. Glass fibers are favorable as a filter medium because they give a
A.lower pressure drop and are less liable to wetting or combustion
B.more pressure drop and are less liable to wetting or combustion
C.lower pressure drop and are more liable to wetting or combustion
D.more pressure drop and are more liable to wetting or combustion
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11. The collection efficiency by interception increases with the
A.increasing particle diameter
B.increasing air flow velocity
C.both (a) and (b)
D.increasing particle size
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12.  For indirect heating, the plate and frame heat exchanger is generally more effective than the shell and tube heat transfer due to its
A.larger heat transfer area
B.smaller heat transfer area
C.lesser cost
D.more number of plates
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13. The mechanism of air filtration in fibrous filter is
A.electrostatic attraction
B.impaction
C.interception
D.all of these
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14. If the packing density (α) is defined as the volume of the fiber unit volume of filter bed, the velocity within the filter void space is equal to (where V is velocity in fluid void space and V0 is undisturbed fluid velocity)
A.V = V0/(1-α)
B.V-V0 = 1 - α
C.V = V0(1 - α)
D.V = V0/(1 + α)
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