Name of the University : Mahatma Gandhi University
Department : Polymer Engineering
Degree : B.Tech
Subject Code/Name : PO 010 503/Polymer Processing I
Sem : V
Website : mgu.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5372-PO503.doc
Polymer Processing Model Question Paper
Fifth Semester B Tech Degree Examination :
Polymer Engineering :
PO 010 503: Polymer Processing I
Max Marks : 100
Time : 3 Hrs
Related : Mahatma Gandhi University Rubbers-Science & Technology B.Tech Model Question Paper : www.pdfquestion.in/5371.html
Part A :
Answer all questions :
Each question carries 3 marks :
1. Write the function of accelerators with two examples.
2. Give three examples of blowing agents.
3. What is Factice. Give two examples.
4. Define Friction ratio.
5. Define core, cavity and impression of a mould. (5 X 3=15)
Part B :
Answer all questions :
Each question carries 5 marks :
6. Distinguish between distributive and dispersive mixing in rubber compounding.
7. Compare the function of Peptisers and Plasticisers with examples.
8. Write a formulation for a rubber product with good weathering resistance.
9. What are the advantages of two roll mill mixing.
10. Explain activities involved in a compression moulding cycle time. (5 X 5= 25)
Part C :
Answer all questions :
Each question carries 12 marks :
11. (a)Explain various types of antidegradents used in rubber compounding with examples.
OR
(b)Explain on the advantages and disadvantages of various curing agents.
12. (a)What are the primary requirements of a Plasticisers. Explain various types of Plasticisers.
OR
(b)Give note on i) Mould release agents ii) Pigments iii) Bonding agents
13. (a ) Explain the factors to be considered in formulating a rubber compound.
OR
(b)Design a compound for i) air impermeability ii) heat resistance and write the reason for selection of each ingredient and its dosage.
14. (a)What is continuous mixing. Elaborate on the various continuous mixing Equipments.
OR
(b)Draw a neat sketch of a two roll mill and explain the various parts and functioning.
15. (a)What is fully automatic compression moulding. Suggest Trouble shooting guide for compression moulding.
OR
(b)With sketch explain various types of Transfer Moulding.
(5 X 12= 60)
Polymer Processing II
Max Marks : 100
Time : 3 Hrs
Part A : (Answer all Questions)
1.Name the main parameters considered in categorizing Injection Moulding Machine.
2.Write on the functions of Screen pack and Breaker plate.
3. What is meant by parison and preform.
4.Define matched metal thermoforming.
5. What are the problems associated with calendering.
(5 X 3=15)
Part B : ( Answer all Questions)
6. Distinguish between two plate and three plate mould in Injection moulding process.
7. What are the different types of extrusion Dies?
8. What are the features of stretch blow moulding?
9. What are the advantages of thermoforming?
10. What are the various methods of powder coating?
(5 X 5= 25)
Part C : ( Answer all Questions Choosing either a OR b)
11. (a) Explain the various parts of an injection moulding machine with the functions of each part.
OR
(b) Explain the difference between Hydraulic and Toggle clamping with figures.
12. (a) Explain Single screw and Twin screw Extruders and the advantages of both types.
OR
(b) Compare and contrast between Blown film and Flat film Extrusion with figures.
13. (a) Give notes on a) Parison Programming b) Core rod c) Blow mould.
OR
(b) Compare the process of Extrusion Blow moulding and Injection Blow moulding.
14. (a) Write a note on the mould, machinery and limitations of Thermoforming.
OR
(b) Explain In-mold and Off-Mold product decoration methods for plastic products.
15. (a) Explain various types of Rotational moulding techniques with advantages of each.
OR
(b) Write notes on a) Calender defects and remedies b) Powder coating material manufacture.
(5 X 12= 60)
Polymer Blends and Composites
Time: 3Hours
Maximum Marks: 100
Part A : (Answer all questions)
(Each question carries 3 marks)
1. What are the thermodynamic criteria for miscibility in a polymer blend system
2. Briefly explain the molecular architecture and properties of styrene block copolymer based TPEs
3. Name three commercially important matrices and reinforcements in composite manufacturing
4. Briefly mention on polymer concrete
5. Mention the advantages and disadvantages of hand lay up (3×5 =15)
Part B : (Answer all questions)
(Each question carries 5 marks)
6. Based on miscibility, how polymer blends are classified. Explain the morphology of each with examples
7. What is dynamic vulcanization? With example, discuss the properties of dynamically vulcanized blends
8. Briefly explain the rule of mixtures in composites
9. Briefly explain on polymeric binders used in rocket propellants
10. What is meant by filament winding (5×5 =25)
Part C : (Answer either a OR b)
(Each question carries 12 marks)
11(a) (i) Explain in detail the various methods of preparing polymer blends
(ii) Discuss on any one technique for characterizing polymer blends
OR
(b) (i) Explain on the specific interactions present in polymer blends
(ii) With neat sketch, explain the phase separation phenomena
12(a) Discuss on the basic structure, manufacture, morphology and applications of thermoplastic
polyurethane elastomers
OR
(b) Write notes on (i) ionic TPEs (ii) silicone based TPEs
13 (a) What are composites? What are the advantages of composites over traditional engineering
materials? Explain the role of matrix and reinforcement in composite technology
OR
(b) Write notes on
(i) factors affecting the performance of composites (ii) bonding agents
(iii) critical fibre length
14(a) What is the composition of glass? Explain the production of glass fibre. What are the different
types and its important properties.
OR
(b) Write notes on
(i) carbon fibre (ii) aramid fibre (iii) Polymer concrete
15(a) With a neat sketch, explain filament winding process. Mention the applications
OR
(b) Write notes on
(i) vacuum bag moulding (ii) pultrusion (iii) RRIM (12×5 =60)