Food Packaging Technology Nptel Week 4 Answers
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Food Packaging Technology Nptel Week 4 Answers (July-Dec 2025)
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Question 1. While designing a package, for which of the following products should internal pressure be considered?
a) Meat
b) Coffee
c) Carbonated beverages
d) Fresh fruits
Question 2. What is WVTR?
a) Water to vapor transient rate
b) Water to vapor transfer rate
c) Water vapor transmission rate
d) Water to vapor transfer ratio
Question 3. WVTR is expressed as ___________
a) g/cm2 /24 hr
b) g/cm2
c) g/m2
d) g/m2 /24 hr
Question 4. 5g/100cm2 is equal to ___________
a) 50g/m2
b) 500g/m2
c) 5000g/m2
d) 0.05g/m2
These are Food Packaging Technology Nptel Week 4 Answers
Question 5. The sum of all mobile packaging components (molecules) released per unit area of packaging material under defined conditions is called
a) Specific migration
b) Overall migration (global migration)
c) Diffusion
d) Non-migration
Question 6. The containers that are fitted with a device that irreversibly indicates if the container has been opened are called ___________
a) Tamper evident containers
b) Gas resistant containers
c) Light resistant containers
d) Air tight containers
Question 7. Cobb’s test is used to measure ___________
a) Water transmission
b) Water absorption
c) Odor transmission
d) Gas permeability
Question 8. When powdery chips are formed when plastic is cut, it is probably a ___________
a) Thermoplastic
b) Thermoset plastic
c) Edible package
d) Aseptic package
Question 9. If the packaging material gives a green flame, it is likely to be
a) PVC
b) PET
c) Nylon
d) Polystyrene
Question 10. Transfer of one or more identifiable substances that is a constituent of the packaging material
a) Overall migration
b) Specific migration
c) Permeation
d) Total migration
Question 11. Identify the test performed using the following equipment:
a) WVTR
b) OTR
c) Cobb’s test
d) Puncture test
Question 12. WVTR is measured at ___________
a) Temperature: 27±1⁰C; RH: 65±2%
b) Temperature: 37±1⁰C; RH: 90±2%
c) Temperature: 27±1⁰C; RH: 75±2%
d) Temperature: 18±1⁰C; RH: 95±2%
Question 13. The following system is used for the determination of ___________
a) WVTR
b) OTR
c) Cobb’s test
d) Burst strength
Question 14. The unit for OTR is ___________
a) ml/m2/24h atmos
b) ml/cm2.24h atmos
c) ml/m2.24h atmos
d) ml/m2.48h
Question 15. The given formula is for ___________
a) Polyethylene
b) Polyamide
c) Polyphenol
d) None of the above
Question 16. 25 microns is equal to ___________ gauge
a) 1
b) 10
c) 100
d) 1000
These are Food Packaging Technology Nptel Week 4 Answers
Question 17. Which packaging material has the lowest oxygen transmission rate?
a) EVOH
b) LDPE
c) HDPE
d) PP
Question 18. Residues of Bisphenol A in foods are due to ___________
a) Migration from plastics packaging
b) Contamination
c) High-temperature processing
d) Presence of pesticides
Question 19. Which of the following sinks in alcohol?
a) PP
b) HDPE
c) LDPE
d) LLDPE
Question 20. In India, overall migration limit for packaging materials is set as ___________
a) 100 mg/kg
b) 60 mg/kg
c) 100 mg/dm2
d) 50 mg/dm2
These are Food Packaging Technology Nptel Week 4 Answers