Sterilization – Section 1

1. The sterilization method depends

A. nature of additive
B. volume and feed rate
C. both (a) and (b)
D. none of these

Correct Answer: C. both (a) and (b)

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

Correct Answer: A. ln 2/D

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

A. dp/Dc
B. dpx Dc
C. dp/Dcx 100
D. dpDc/100

Correct Answer: A. dp/Dc

4. The relationship between the del factor, temperature and time is given as

A. Δ = A.t. eE/RT
B. Δ = 1/(A.t. e-E/RT)
C. Δ = A.t. eE/RT
D. Δ = A.t.T

Correct Answer: A. Δ = A.t. eE/RT

5. The del factor (Δ) increases as the final number of cells

A. decreases
B. increases
C. zero
D. constant

Correct Answer: A. decreases

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