Download GTU BE/B.Tech 2019 Winter 4th Sem New 2142301 Basic Plastic Processing And Thermal Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- IV (New) EXAMINATION - WINTER 2019

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Subject Code: 2142301 Date: 07/12/2019
Subject Name: Basic Plastic Processing and Thermal Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Explain the Polymer processing with classification for thermoplastic and thermoset material. 03
(b) Discuss the Polymer melt flow behavior in processing of plastic material. 04

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(c) Define the consideration for selection of particular method of processing. 07

Q.2 (a) Describe the Bulk factor with its significance. 03
(b) List out the steps involved in compression molding process and machine specifications. 04
(c) Explain Intermittent Extrusion Blow molding process in detail with neat sketch. 07

OR

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(c) Write the compression molding defects with causes and remedies. 07

Q.3 (a) Comparison between Transfer molding with Compression molding. 03
(b) Differentiate between the Extrusion blow molding and Injection blow molding process. 04
(c) Write the Transfer Molding process defects with causes and remedies. 07

OR

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Q.3 (a) What are the Raw material criteria for roto molding process? Explain its advantages and limitations. 03
(b) Explain the Melt stability and Plastic memory of material for thermoforming process. 04
(c) Describe the types of molds used for transfer molding process with neat sketch. 07

Q.4 (a) State the differences between Vacuum and Pressure forming technique. 03
(b) Explain Stretch blow molding with advantages and Limitations. 04

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(c) Describe the Parison diagram, advantages and disadvantages. 07

OR

Q.4 (a) Explain the Gel time and its importance for Thermoset material processing. 03
(b) Describe the Flash type mold with advantages and limitations. 04
(c) What are the types of machine used for roto molding and explain in detail the Shuttle type machine with advantages and limitations. 07

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Q.5 (a) Explain the modes of heat transfer in details. 03
(b) Write in detail about finned tube heat exchanger. 04
(c) What are the different applications of heat transfer principles in plastics industries? 07

OR

Q.5 (a) Explain the Law of heat transfer in details. 03

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(b) Define the over all heat transfer coefficient. 04
(c) Give the detailed note on shell and tube heat exchanger with advantages and disadvantages. 07