Sterilization – Section 1

6. The overall del factor (Δ) may be represented as

A. Δ_overall= Δ_heating+ Δ_heating– Δ_cooling
B. Δ_overall= Δ_heating+ Δ_heating+ Δ_cooling
C. Δ_overall= Δ_heating– Δ_heating+ Δ_cooling
D. Δ_overall= Δ_heating– Δ_holding– Δ_cooling

7. The filter material used for air filtration system is/are

A. glass wool
B. glass fiber
C. norite
D. all of the above

8. The deviation from ideal plug flow due to axial mixing can be described by the

A. dispersion model
B. Langmuir model
C. Friedlander model
D. Pasceri model

9. The collection efficiency by diffusion increases with

A. decreasing particle size
B. decreasing air velocity
C. both (a) and (b)
D. increasing particle size

10. Glass fibers are favorable as a filter medium because they give a

A. lower pressure drop and are less liable to wetting or combustion
B. more pressure drop and are less liable to wetting or combustion
C. lower pressure drop and are more liable to wetting or combustion
D. more pressure drop and are more liable to wetting or combustion