GATE XE format:mcq PYQs & Answers — Page 44

Questions 431–440 of 959. Imported answers require independent review unless marked reviewed.

Topic practice 959 questionsPage 44 of 96

Match the following polymer product with its most appropriate processing technique

Polymer product: P. Bottle Q. Blister packaging R. Reinforced electric poles S. Sewage pipes

Processing technique:

Extrusion

Pultrusion

Injection blow molding

Thermoforming

Your answerChoose one option.

P-3; Q-4; R-1; S-2

P-3; Q-4; R-2; S-1

P-4; Q-3; R-2; S-1

P-3; Q-2; R-4; S-1

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Match the following additives to their respective functions

Additive: P. p-phenylenediamine Q. Trisyl phosphate R. Polybutadiene rubber S. Talc

Function:

Flame retardant

Impact modifier

Nucleating agent

Antioxidant

Your answerChoose one option.

P-4; Q-2; R-1; S-3

P-3; Q-1; R-2; S-4

P-4; Q-1; R-3; S-2

P-4; Q-1; R-2; S-3

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Match the polymers with their characteristic infrared (IR) stretch frequency

Polymer: P. Polyurethane Q. Polyethylene R. Polysulfone S. Acrylonitrile-butadiene-styrene copolymer

IR stretch (cm⁻¹):

~234

~151

~1720

~2914

Your answerChoose one option.

P-4; Q-3; R-2; S-1

P-3; Q-4; R-2; S-1

P-3; Q-4; R-1; S-2

P-3; Q-2; R-4; S-1

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Match the following polymers to the most appropriate product

Polymer: P. Expanded polystyrene Q. Polyether ketone R. Polycarbonate S. Poly(butylene terephthalate)

Product:

Motor bearings

TV cabinet

Sound proof walls

Safety glass

Your answerChoose one option.

P-2; Q-1; R-4; S-3

P-2; Q-4; R-1; S-3

P-3; Q-1; R-2; S-4

P-3; Q-1; R-4; S-2

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Match the polymers to the polymerization method used for their synthesis.

Polymer	Polymerization method
P. Linear low density polyethylene	1. Ring opening
Q. Nylon 6	2. Ziegler-Natta
R. Styrene-butadiene rubber	3. Condensation
S. Aromatic polyamide	4. Emulsion

Your answerChoose one option.

P-2; Q-1; R-4; S-3

P-2; Q-1; R-3; S-4

P-2; Q-3; R-4; S-1

P-2; Q-4; R-1; S-3

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Which among the given options truly depict the lines 1 and 2 in the figure below with respect to the effect of heat processing on food?

Diagram for Engineering Sciences question 132

Your answerChoose one option.

1-Safety, 2-Quality

1-Yield, 2-Safety

1-Yield, 2-Quality

1-Quality, 2-Safety

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Homogenization of milk leads to disintegration of fat globules by

Your answerChoose one option.

Turbulence and pasteurization

Pasteurization and cavitation

Pasteurization and pressurization

Turbulence and cavitation

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The lowest water activity (a

) supporting the growth of Staphylococcus aureus in food under aerobic condition is

Your answerChoose one option.

0.98

0.91

0.89

0.86

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Match the edible oil refining stages given in Column I with their respective functions in Column II

Column I Column II

P. Degumming 1. Separation of waxes Q. Neutralization 2. Remove of pigments R. Bleaching 3. Remove of phosphates S. Winterization 4. Remove of free fatty acids

Your answerChoose one option.

P-3, Q-2, R-1, S-4

P-2, Q-1, R-3, S-4

P-3, Q-4, R-2, S-1

P-3, Q-1, R-2, S-4

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Make the correct pair of food packaging technology given in Column I with operating principle or description in Column II.

Column I Column II P. Aseptic packaging 1. Control of the concentration of O₂ and CO₂ inside the package Q. Active packaging 2. Create a skin tight package wall R. Modified atmosphere packaging 3. Independent sterilization of food and packaging material and packing under sterile environment S. Vacuum packaging 4. Makes non-passive contribution to product development

Your answerChoose one option.

P-3, Q-4, R-1, S-2

P-3, Q-2, R-1, S-4

P-1, Q-4, R-3, S-2

P-3, Q-1, R-4, S-2

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GATE XE format:mcq PYQs

Question 121

Question 122

Question 123

Question 124

Question 125

Question 132

Question 133

Question 134

Question 141

Question 142