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STM3163 permeation

Authored by AZLIN HASIM

Chemistry

University

Used 8+ times

STM3163 permeation
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10 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which of the following is a characteristic of gas?

Permeation is directly proportional to barrier

Permeable to glass and metal packaging materials

Exist only in gaseous state at ambient temperature and atmospheric pressure

Condensable at ambient temperature

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the major mechanism of transport of gas and vapor through a plastic film or package wall?

Diffusion

Adsorption

Leak

Permeation

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the effect of oxygen ingress on dehydrated meat, egg, cheese, and fried food?

Reduces nutrient value

Leads to lipid oxidation and off flavors

Causes sogginess

Enhances flavor and color

4.

MULTIPLE SELECT QUESTION

20 sec • 1 pt

Which packaging material is not permeable to gas and vapor?

Plastic

Glass

Metal

Paper

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which behavior is exhibited by the diffusion of permanent gases in polymers?

Fickian behavior

Concentration dependent behavior

Concentration independent behavior

Non-Fickian behavior

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How total permeability of a multilayer film calculated?

difference of the permeability of individual layers

product of the permeability of individual layers

average of the permeability of individual layers

sum of the permeability of individual layers

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which polymer offers low oxygen barrier?

PET

PE

PP

EVOH

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