Download GTU BE/B.Tech 2018 Winter 6th Sem New 2162308 Advance Plastics Processing Question Paper

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Subject Code: 2162308

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-VI (NEW) EXAMINATION - WINTER 2018

Subject Name: Advance Plastics Processing

Date: 27/11/2018

Time: 02:30 PM TO 05:00 PM

Total Marks: 70

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

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1. Draw and explain various types of Calendar roll arrangements. [03]
2. List the general production methods of foam. [04]
3. Explain the Rotational Molding process with a neat diagram. [07]

Q.2

1. Explain the encapsulation process briefly. [03]

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2. List the advantages and disadvantages of Rotational Molding. [04]
3. With a neat diagram explain the Low pressure structural foam molding process. [07]

OR

1. Write a short note on Finishing & Machining of Plastics. [07]

Q.3

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1. Define i) Foamed plastics ii) Open celled foam iii) Blowing agents. [03]
2. Compare Rotational Molding with Blow Molding. [04]
3. With a neat diagram explain the Injection Stretch Blow Molding process. [07]

OR

1. Mention any two problems, its causes and remedies, found in blow molding process. [03]

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2. Explain the Vacuum Metalizing process with a neat sketch. [04]
3. Explain the process of Calendaring with a neat line Diagram. [07]

Q.4

1. Explain briefly what is parison/programming. [03]
2. With a neat diagram explain the Screen printing process. [04]

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3. Explain the Electrostatic (Fluidized Bed Powder Coating Process with a neat sketch. [07]

OR

1. Explain the heating system for calendar roll arrangement. [03]
2. Explain any two Problems its causes and its remedies found in Calendaring process. [04]
3. List various methods of surface treatment for plastics and explain the Corona discharge process with a neat sketch. [07]

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Q.5

1. List the welding techniques for plastics and briefly explain any one. [03]
2. Discuss briefly about expandable PS foams with a neat sketch. [04]
3. Compare Extrusion Blow Molding with Injection Blow Molding. [07]

OR

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1. Explain briefly about gravure printing process. [03]
2. What is Structural foam? List its advantages and disadvantages. [04]
3. Explain the steps in Reaction Injection Molding process with a neat flow diagram. [07]