Biochemical Engineering Archives

The collection efficiency by impaction increases with

July 20, 2022 by admin

Question: The collection efficiency by impaction increases with
[A].

increasing particle diameter

[B].

increasing air flow velocity

[C].

both (a) and (b)

[D].

increasing particle size

Answer: Option C

Explanation:

No answer description available for this question.

Model proposed by the Friedlander, correlating the air filtration efficiency by impaction can be expressed as (where NSt is the Stokes number)

July 20, 2022 by admin

Question: Model proposed by the Friedlander, correlating the air filtration efficiency by impaction can be expressed as (where NSt is the Stokes number)
[A].

ηimp = 0.075NSt1.2

[B].

ηimp = 0.75NSt1.2

[C].

ηimp = 0.25NSt1.2

[D].

ηimp = 0.025NSt1.2

Answer: Option A

Explanation:

No answer description available for this question.

The collection efficiency by the inertial impaction mechanism is the function of

July 20, 2022 by admin

Question: The collection efficiency by the inertial impaction mechanism is the function of
[A].

Stokes and Reynolds number

[B].

Stokes and Schmidt number

[C].

Grashoff and Reynolds number

[D].

Stokes and Grashof number

Answer: Option A

Explanation:

No answer description available for this question.

The mechanism of air filtration in fibrous filter is

July 20, 2022 by admin

Question: The mechanism of air filtration in fibrous filter is
[A].

electrostatic attraction

[B].

impaction

[C].

interception

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

In sterilization process, spore of which of the following organism is considered as control?

July 20, 2022 by admin

Question: In sterilization process, spore of which of the following organism is considered as control?
[A].

Bacillus subtilis

[B].

Clostridium botulinum

[C].

Bacillus stearothermophilus

[D].

Aspergillus niger

Answer: Option C

Explanation:

No answer description available for this question.

The specific death rate of an organism can be expressed as

July 20, 2022 by admin

Question: The specific death rate of an organism can be expressed as
[A].

ln 2/D

[B].

D/ln2

[C].

D.ln2

[D].

2.0.3/ln2

Answer: Option A

Explanation:

No answer description available for this question.

The mechanical means of accomplishing sterilization of fermentation media/equipment is

July 20, 2022 by admin

Question: The mechanical means of accomplishing sterilization of fermentation media/equipment is
[A].

ultrasonic

[B].

radiation

[C].

chemical agents

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Sterilization can be carried out by

July 20, 2022 by admin

Question: Sterilization can be carried out by
[A].

heat

[B].

radiation

[C].

chemical agents

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Various techniques are available for determining the effective diffusivity of solute in gel. Thin disk method uses

July 20, 2022 by admin

Question: Various techniques are available for determining the effective diffusivity of solute in gel. Thin disk method uses
[A].

a diffusion cell with two compartments divided by a thin gel

[B].

a diffusion cell with two compartments

[C].

a diffusion cell with two compartments plus by a thin gel

[D].

a diffusion cell with two compartments multiply by a thin gel

Answer: Option A

Explanation:

No answer description available for this question.

The effectiveness factor increases with the

July 20, 2022 by admin

Question: The effectiveness factor increases with the
[A].

increase of diffusivity and decreased with the increase of particle size

[B].

increase of diffusivity and increased with the increase of particle size

[C].

decrease of diffusivity and decreased with the increase of particle size

[D].

increase of diffusivity and decrease with the decrease of particle size

Answer: Option A

Explanation:

No answer description available for this question.