GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Seat No.:
Enrolment No.
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (New) EXAMINATION — WINTER 2018
Date: 01/12/2018
Subject Code: 2132302
Subject Name: Manufacturing of Plastic Materials-1
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Time: 10:30 AM TO 01:00 PMInstructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Total Marks: 70
| Q.1 | MARKS | |
| (a) | Define examples i) Monomer ii) Polymer iii) Polymerization | 03 |
| (b) | List the differences between thermoplastics and thermosets. | 04 |
| (c) | Draw a flow chart and explain the manufacturing of Melamine Formaldehyde. | 07 |
| OR | ||
| (c) | Explain the cross linking of Polyester resin by styrene linkages | 07 |
| Q.2 | ||
| (a) | Explain the preparation of Unsaturated Polyester resin. | 03 |
| (b) | List the applications of Epoxy. | 04 |
| (c) | Write a short note on curing mechanism of Urea Formaldehyde | 07 |
| OR | ||
| (a) | Name the appropriate thermoset material used in the production of the following items i) Dinnerware ii) Adhesives and coatings iii) O-rings | 03 |
| (b) | Explain the preparation of Melamine and Formaldehyde monomers. | 04 |
| (c) | List the properties and applications of Urea Formaldehyde Resin. | 07 |
| Q.3 | ||
| (a) | List the uses of Polyurethane. | 03 |
| (b) | State the properties and applications of Phenol Formaldehyde. | 04 |
| (c) | Explain the preparation Bis-phenol A and Epichlorhydrin monomers for Epoxy Resin. | 07 |
| OR | ||
| (c) | Explain the manufacturing of Silicone Resin. | 03 |
| Q.4 | ||
| (a) | List the properties and applications of Polyester resin. | 03 |
| (b) | Explain the preparation and curing of Diglycidyl ether in manufacturing of Epoxy resin. | 04 |
| (c) | Draw a flow chart and explain the manufacturing of Urea Formaldehyde. | 07 |
| OR | ||
| (a) | Explain the Dow process and Sulphonation process to manufacture Phenol. | 04 |
| (b) | List the properties and applications of Melamine Formaldehyde. | 07 |
| Q.5 | ||
| (a) | How is Urea monomer prepared? | 03 |
| (b) | List the properties and applications of Silicon Resin. | 04 |
| (c) | How are Novolac and Resols formed? Explain. | 07 |
| OR | ||
| (a) | List the properties of Epoxy. | 03 |
| (b) | Explain the preparation of Polyurethane. | 04 |
| (c) | With a neat flow diagram explain the process of Naptha Cracking. | 07 |
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