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Sterilization

The radius of the filter with a depth of 14 cm required for a volumetric airflow rate of 10 m3/min is approximately

Question: The radius of the filter with a depth of 14 cm required for a volumetric airflow rate of 10 m3/min is approximately
[A].

1.6 m

[B].

0.6 m

[C].

3

[D].

6 m

Answer: Option B

Explanation:

No answer description available for this question.

The radius of the filter with a depth of 14 cm required for a volumetric airflow rate of 10 m3/min is approximately Read More »

Biochemical Engineering, Sterilization

The X90 value for a filtration system is

Question: The X90 value for a filtration system is
[A].

the time required to reduce microbial population by 90%

[B].

the time required to traverse survivor curve by one log cycle.

[C].

the depth required to reduce population by 90%

[D].

the depth of the filter required to reduce population by 99%

Answer: Option C

Explanation:

No answer description available for this question.

The X90 value for a filtration system is Read More »

Biochemical Engineering, Sterilization

The efficiency of fibrous filter by combined mechanism is given by(where ηimp,ηint,ηdif are the efficiencies by impaction, interception and diffusion respectively)

Question: The efficiency of fibrous filter by combined mechanism is given by(where ηimp,ηint,ηdif are the efficiencies by impaction, interception and diffusion respectively)
[A].

1 – ηimpηintηdif

[B].

1 – (1 – ηimp)(1 – ηint)( 1 – ηdif)

[C].

1 – ( ηimpηint/ηdif)

[D].

None of the above

Answer: Option A

Explanation:

No answer description available for this question.

The efficiency of fibrous filter by combined mechanism is given by(where ηimp,ηint,ηdif are the efficiencies by impaction, interception and diffusion respectively) Read More »

Biochemical Engineering, Sterilization

The interception efficiency can be expressed as (where dp is the particle diameter and Dc cylindrical collection diameter)

Question: The interception efficiency can be expressed as (where dp is the particle diameter and Dc cylindrical collection diameter)
[A].

dp/Dc

[B].

dp x Dc

[C].

dp/Dc x 100

[D].

dpDc/100

Answer: Option A

Explanation:

No answer description available for this question.

The interception efficiency can be expressed as (where dp is the particle diameter and Dc cylindrical collection diameter) Read More »

Biochemical Engineering, Sterilization

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

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.

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

Biochemical Engineering, Sterilization