GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019
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Subject Code: 2172307
Subject Name: FRP Technology and composites
Time: 10:30 AM TO 01:00 PM
Date: 03/12/2019
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | MARKS |
|---|---|
| (a) Which are the advantages of FRP? | 03 |
| (b) Explain Hand layup process. List various advantages and limitations of Hand layup process. | 04 |
| (c) What are the advantages of Vacuum bag molding process? Explain vacuum bag molding process with neat diagram. | 07 |
| Q.2 (a) Define: Composites, Gelation, Curing | 03 |
| (b) Discuss material selection and process selection criteria for designing in FRP. | 04 |
| (c) With neat diagram explain Pultrusion process. Which products can be prepared by this process? | 07 |
| OR | |
| (c) Discuss various types of accelerators used for unsaturated polyester resin. | 07 |
| Q.3 (a) List various types and forms of glass fibers used as reinforcement. | 03 |
| (b) Explain Plaster mold with neat diagram. | 04 |
| (c) With neat flow diagram explain manufacturing of carbon fiber. | 07 |
| OR | |
| Q.3 (a) What is the role of Surfacing tissue? Explain. | 03 |
| (b) Discuss Aramid fiber along with its advantages. | 04 |
| (c) Explain curing reaction of unsaturated polyester resin. | 07 |
| Q.4 (a) Discuss various types of glycols used to prepare unsaturated Polyester resin. | 03 |
| (b) Enlist various commercially available polyester resins. Explain role of Gelcoat and topcoat in brief. | 04 |
| (c) Explain GRP molds with neat diagram. | 07 |
| OR | |
| Q.4 (a) Explain types of catalysts used for unsaturated polyester resin. | 03 |
| (b) How Prepreg is prepared? Explain with neat diagram. | 04 |
| (c) Resin Transfer molding process along with its advantages. | 07 |
| Q.5 (a) What is the role of monomer in preparation of polyester resin? List various types of monomer used. | 03 |
| (b) Explain manufacturing process for glass fibers with neat diagram. | 04 |
| (c) With neat diagram explain Sheet molding compound along with its formulation. | 07 |
| OR | |
| (a) What is the role of reactive diluents. | 03 |
| (b) Write about Reduced flammability resins and Low styrene emission polyester resins in brief. | 04 |
| (c) Which type of products can be manufactured by Filament Winding? Explain process with neat diagram. | 07 |
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