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Biochemical Engineering Objective Questions { Sterilization }



1. The sterilization method depends
A.nature of additive
B.volume and feed rate
C.both (a) and (b)
D.none of these
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2. 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
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3. 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
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4. The relationship between the del factor, temperature and time is given as
A.Δ = A.t. e-E/RT
B.Δ = 1/(A.t. e-E/RT)
C.Δ = A.t. eE/RT
D.Δ = A.t.T
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5. The del factor (Δ) increases as the final number of cells
A.decreases
B.increases
C.zero
D.constant
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6. The overall del factor (Δ) may be represented as
A.Δoverall = Δheating + Δholding- Δcooling
B.Δoverall = Δheating + Δholding+ Δcooling
C.Δoverall = Δheating - Δholding+ Δcooling
D.Δoverall = Δheating - Δholding- Δcooling
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7. The filter material used for air filtration system is/are
A.glass wool
B.glass fibre
C.norite
D.all of the above
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