4. Food Processing and Engineering

Packaging Technology — Quiz

Test your understanding of packaging technology with 5 practice questions.

Practice Questions

Question 1

Which term describes the ratio of the permeability coefficients of two gases through a polymer film, indicating selective barrier performance?

Question 2

Given a polymer film with CO_2 permeability $P_{CO2}=200\,\mathrm{cm^3/(m^2\cdot d\cdot atm)}$ and O_2 permeability $P_{O2}=20\,\mathrm{cm^3/(m^2\cdot d\cdot atm)}$, what is the permselectivity for CO_2 over O_2?

Question 3

How does increasing relative humidity typically affect the water vapor barrier performance of hydrophilic polymer coatings such as polyvinyl alcohol (PVOH)?

Question 4

Why are photoprotective (UV-blocking) coatings applied to packaging for light-sensitive foods like dairy and oils?

Question 5

Which effect does increasing storage temperature have on gas permeability through polymer packaging according to Arrhenius behavior?