Question: The filter material used for air filtration system is/are
[A].glass wool
glass fibre
norite
all of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Biochemical Engineering
The value of K
Question: The value of K
[A].increases with increase in air velocity
decreases with increase in air velocity
increases to an optimum with increase in air velocity and decreases on further increase of air velocity
none of these
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
The K used in the equation for X10=2.303/K depends upon
Question: The K used in the equation for X10=2.303/K depends upon
[A].nature of the filter material
linear velocity of the air passing through filter
both (a) and (b)
thickness of the filter
[A].
[B].
[C].
[D].
Answer: Option C
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
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
0.6 m
3
6 m
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
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%
the time required to traverse survivor curve by one log cycle.
the depth required to reduce population by 90%
the depth of the filter required to reduce population by 99%
[A].
[B].
[C].
[D].
Answer: Option C
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)
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
1 – (1 – ηimp)(1 – ηint)( 1 – ηdif)
1 – ( ηimpηint/ηdif)
None of the above
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The typical size of particles collected by diffusion mechanism is
Question: The typical size of particles collected by diffusion mechanism is
[A].<0.25μm
<0.5μm
<0.75μm
<1μm
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
The collection efficiency by diffusion increases with
Question: The collection efficiency by diffusion increases with
[A].decreasing particle size
decreasing air velocity
both (a) and (b)
increasing particle size
[A].
[B].
[C].
[D].
Answer: Option C
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)
Question: The interception efficiency can be expressed as (where dp is the particle diameter and Dc cylindrical collection diameter)
[A].dp/Dc
dp x Dc
dp/Dc x 100
dpDc/100
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The collection efficiency by interception increases with the
Question: The collection efficiency by interception increases with the
[A].increasing particle diameter
increasing air flow velocity
both (a) and (b)
increasing particle size
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.