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ICAR AICE-JRF/SRF Food Packaging Science & Technology: practice questions

ICAR AICE-JRF/SRF (PhD) — Food Processing Technology, Food Safety & Quality, Processing and Food Engineering · India · ICAR through the National Testing Agency

Original practice questions written to the published syllabus · not past papers
10worked here, free
79written to this exam in this subject
16syllabus units

What this subject covers

Packaging as part of the preservation system: materials and their barrier properties, package design and testing, metal cans, glass, paper and plastics, aseptic, modified-atmosphere, active and intelligent packaging, migration and food-contact law, and packaging sustainability. Agricultural Engineering's storage-engineering-packaging covers bulk storage and an introduction to packaging materials; this subject is the full packaging course.

In the exams: GATE XE-G Section 3 (packaging materials, aseptic packaging, controlled and modified atmosphere storage) and Section 4 (permeability through films); ICAR AIEEA-PG Code 18 Unit III; ICAR AICE 35.a Unit 5 and 37 Unit 2

What ICAR AICE-JRF/SRF asks from it

ICAR AICE-JRF/SRF (PhD) — Food Processing Technology, Food Safety & Quality, Processing and Food Engineering

35.a Unit 5 names packaging materials and testing, metal cans and corrosion, shelf-life studies, aseptic, modified-atmosphere, vacuum, active and intelligent packaging, edible and biodegradable materials and FSSAI packaging and labelling requirements; 37 Unit 2 covers dairy packaging, retort pouches, migration of toxins and industrial packaging. Expect deeper questions on migration, MAP safety and recyclability.

Where the 79 questions fall

How our questions for ICAR AICE-JRF/SRF spread across the units of Food Packaging Science & Technology. Difficulty: 4 easy, 56 medium, 19 hard.

Package testing methods7
Paper, paperboard and corrugated packaging6
Plastics: polymer types, properties and processing6
Barrier properties: water vapour and oxygen transmission rates6
Migration and food-contact material regulation6
Packaging waste, recycling and extended producer responsibility6
Metal cans: tinplate, tin-free steel and aluminium; corrosion and lacquers5
Laminates, coextrusion and coatings5
Active packaging: oxygen scavengers, moisture absorbers and antimicrobials5
Intelligent packaging: indicators, sensors and RFID5
Edible and biodegradable packaging5
Aseptic packaging systems4
Modified-atmosphere and vacuum packaging4
Functions and levels of food packaging3
Glass containers3
Labelling and coding on packages3

10 practice questions, worked

Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.

1 · Paper, paperboard and corrugated packaging · medium

Among common flute profiles, the one giving the largest flute height and most cushioning is

  1. E flute
  2. A flute
  3. B flute
  4. F flute
Answer and working

B. A flute

A is the largest; E and finer flutes are used for printable retail cartons.

Further reading: Coles and Kirwan, Food and Beverage Packaging Technology

2 · Glass containers · medium

The safety button on a vacuum-packed jar lid indicates

  1. the product's best-before date
  2. the filling temperature
  3. whether the vacuum has been lost
  4. the oxygen content of the food inside the pouch
Answer and working

C. whether the vacuum has been lost

The button is drawn down by vacuum; if it pops up the seal has failed.

Further reading: Robertson, Food Packaging: Principles and Practice

3 · Laminates, coextrusion and coatings · medium

An aseptic beverage carton contains roughly

  1. 50 % glass, 30 % tin, 20 % paper
  2. 90 % aluminium, 10 % plastic
  3. 75 % paperboard, 20 % polyethylene, 5 % aluminium
  4. 100 % polyethylene
Answer and working

C. 75 % paperboard, 20 % polyethylene, 5 % aluminium

These commonly quoted proportions combine stiffness, liquid tightness and barrier.

Further reading: Coles and Kirwan, Food and Beverage Packaging Technology

4 · Package testing methods · medium

Pouch burst and creep tests evaluate

  1. the colour of the pouch
  2. the oxygen content of the food inside the pouch
  3. overall seal strength by internal pressure
  4. the thickness of the print
Answer and working

C. overall seal strength by internal pressure

Inflating until failure or holding at pressure tests all seals together.

Further reading: Robertson, Food Packaging: Principles and Practice

5 · Modified-atmosphere and vacuum packaging · medium

Nitrogen flushing of crisps and roasted nuts mainly

  1. removes oxygen
  2. adds moisture to keep them soft
  3. inhibits Pseudomonas growth
  4. colours them brown
Answer and working

A. removes oxygen

N2 displaces O2, slowing lipid oxidation, and cushions the product.

Further reading: Robertson, Food Packaging: Principles and Practice

6 · Intelligent packaging: indicators, sensors and RFID · easy

A time–temperature indicator on a pack

  1. shows cumulative temperature exposure by an irreversible colour change
  2. measures the food's exact microbial count at the time of reading
  3. releases preservative when warm
  4. absorbs oxygen from the headspace
Answer and working

A. shows cumulative temperature exposure by an irreversible colour change

TTIs integrate time and temperature; details are in shelf-life-stability.

Further reading: Han (ed.), Innovations in Food Packaging

7 · Intelligent packaging: indicators, sensors and RFID · medium

RFID tags on cases differ from barcodes in that RFID

  1. needs to be printed in ink on the food surface
  2. cannot store any data
  3. works only on glass
  4. is read without line of sight
Answer and working

D. is read without line of sight

Radio-frequency tags are read remotely and can carry more data and sensor readings.

Further reading: Han (ed.), Innovations in Food Packaging

8 · Edible and biodegradable packaging · hard

PLA cups labelled 'compostable' are found in home compost heaps a year later, largely intact. The best explanation is that PLA

  1. is not a plastic
  2. degrades only in the dark
  3. needs industrial composting temperatures to degrade
  4. was coated with aluminium
Answer and working

C. needs industrial composting temperatures to degrade

PLA hydrolysis is slow at ambient temperatures; industrial composting is much hotter.

Further reading: Han (ed.), Innovations in Food Packaging

9 · Migration and food-contact material regulation · medium

NIAS in food-contact materials are

  1. new ingredients added by the food maker
  2. natural antioxidants in the food
  3. national inspection agency standards
  4. non-intentionally added substances
Answer and working

D. non-intentionally added substances

Risk assessment must cover substances not deliberately used.

Further reading: EU Regulations 1935/2004 and 10/2011

10 · Laminates, coextrusion and coatings · medium

Extrusion lamination differs from adhesive lamination in that it

  1. uses no polymers at all
  2. bonds webs with a molten polymer layer
  3. bonds webs with a curing polyurethane adhesive
  4. welds metal sheets
Answer and working

B. bonds webs with a molten polymer layer

A molten polymer such as LDPE is extruded between webs as the bonding layer.

Further reading: Robertson, Food Packaging: Principles and Practice

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Read the subject

Food Packaging Science & TechnologyThe full study manual, free ICAR AICE-JRF/SRFFormat, sections and how it has changed

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Food Packaging Science & Technology for other exams

ICAR AIEEA-PG / PGS · IndiaGATE · IndiaGATE · India

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