GATE XE concept:extrusion PYQs & Answers

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Questions 1–10 of 10. Imported answers require independent review unless marked reviewed.

Topic practice 10 questionsPage 1 of 1

Select the correct option to match the Product with the most appropriate Processing technique from the table given below:

Product		Processing technique
P	Fibre-reinforced pressure vessel	I	Rotomoulding
Q	Overhead water tank	II	Thermoforming
R	Blister package for medicine	III	Filament winding
S	Plastic carry bag	IV	Blown film extrusion

Your answerChoose one option.

P–III ; Q–II ; R–I ; S–IV

P–IV ; Q–III ; R–II ; S–I

P–II ; Q–I ; R–III ; S–IV

P–III ; Q–I ; R–II ; S–IV

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Extrusion cooking is accomplished in four different stages, which are indicated as I, II, III and IV in the figure given below. Choose the correct option representing the name of each stage.

Diagram for Engineering Sciences question 144

Your answerChoose one option.

I – Feeding, II – Cooking, III – Kneading, IV – Expansion

I – Kneading, II – Feeding, III – Cooking, IV – Expansion

I – Feeding, II – Kneading, III – Cooking, IV – Expansion

I – Cooking, II – Kneading, III – Feeding, IV – Expansion

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Which of the following is a discontinuous polymer processing operation?

Your answerChoose one option.

Calendering

Extrusion

Film blowing

Thermoforming

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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 polymer processing operation with respect to its typical range of shear rate.

Processing Operation	Shear rate (s⁻¹)
P. Compression Moulding	1. 1000 - 10000
Q. Extrusion	2. 100 - 1000
R. Calendering	3. 1 - 10
S. Injection Moulding	4. 10 - 100

Your answerChoose one option.

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

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

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

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

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A single screw extruder is operating at a rotational speed of 2 revolutions per second for the extrusion of a Newtonian polymer under open-discharge conditions (in absence of a die, the pressure drop,

= 0). The extruder has a screw diameter,

= 5 cm, a channel depth,

= 0.4 cm, distance between flights,

= 1 cm, and a helix angle,

= 20°. Assume the value of

= 3.14. The volumetric flow rate (rounded off to 2 decimal places) is ______ cm³/s.

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A plastic bucket is manufactured by

Your answerChoose one option.

Compression molding

Injection molding

Extrusion

Blow moulding

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Match the following:


P. Plastic egg container	1. Injection molding
Q. Water tank	2. Extrusion
R. Chair	3. Rotational moulding
S. Cable	4. Thermoforming

Your answerChoose one option.

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

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

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

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

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Match the following terminology to the appropriate polymer processing technique:

Terminology P. Die-swell Q. Breathing R. Plug-assisted S. Mastication

Process Technique

Two roll mill mixing

Thermoforming

Extrusion

Compression moulding

Your answerChoose one option.

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

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

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

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

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Match the processing technique in Column A to the corresponding shear rate (s⁻¹) in Column B:

Column A P. Injection Molding Q. Extrusion R. Calendering S. Compression Molding

Column B

1-10

10-100

100-1000

1000-10000

Your answerChoose one option.

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

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

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

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

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GATE XE concept:extrusion PYQs

How to practice concept:extrusion

Question 115

Question 144

Question 114

Question 121

Question 11

Question 15

Question 6

Question 13

Question 115

Question 119