PO010502 Plastics Science & Technology B.Tech Model Question Paper : mgu.ac.in

Name of the University : Mahatma Gandhi University
Department : Polymer Engineering
Degree : B.Tech
Subject Code/Name : PO 010 502/Plastics- Science & Technology
Sem : V
Website : mgu.ac.in
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5369-PO502.doc

MGU Plastics- Science & Technology Model Paper

Mahatma Gandhi University :
V Semester B. Tech. Degree Examination :
Branch: Polymer Engineering
PO 010 502 Plastics- Science & Technology :
Time: 3 hours
Maximum: 100 Marks

Related : Mahatma Gandhi University Electric Drives & Control B.Tech Model Question Paper : www.pdfquestion.in/5353.html

Part A :
Answer all questions :
Each question carries 3 marks :
1. How crosslinked polyethylene is made?
2. Why stabilizers are important in PVC compounding? Name one stabilizer.
3. Write notes on PVF
4. Nylons exhibit high melting point. Why?
5. Differentiate between thermoplastics and thermosets. Give two examples for each. (5×3=15)

Part B :
Answer all questions :
Each question carries 5 marks :
6. Why polypropylene is more susceptible to oxidation than polyethylene?
7. Compare the structure and properties of PMMA and PAN.
8. What is Teflon? Why it exhibit high thermal stability?
9. What is ring opening polymerization? Illustrate the mechanism with an example.
10. Differentiate between resol and novolac (5×5=25)
Part C :
Answer all questions :
Each question carries 12 marks :
11.What are the raw materials for the preparation of styrene? How is styrene polymerized by the mass polymerization method?
OR
12. How is HDPE prepared industrially ? discuss briefly the various processes
13. Describe the suspension process for manufacturing polyvinyl chloride.
OR
14. Compare the structure of PVC with that of polythene and explain how the structure is related to its properties. What are the important fields of application of PVC.
15. What are polyesters? How many kinds of polyesters are there? Write briefly, how polyesters are produced, in general.
OR
16. Discuss briefly on PU
17. How is nylon 6 prepared industrially? What are its important properties?
OR
18.What are the raw materials for nylon 6? How nylon 6 is prepared?
19. Explain the reaction between phenol and formaldehyde and process of forming PF resins?
OR
20. How UF resin is prepared? Mention the important properties and uses of UF resins

Latex Technology

Part A : Answer all questions
1. Define NR Latex.
2. What is MST?
3. Give one examples of dispersing and emulsifying agents.
4. Name some heat sensiting agents used in latex industry.
5. Give note on use of latex in road rubberisation. ( 5X3=15)

Part B : Answer all questions
6. Explain Natural coagulation in NR latex.
7. Give general composition of NR latex.
8. Differentiate VFA No. and KOH No.
9. Give important surface active agents used in latex compounding.
10. Explain different gelling systems. (5X5=25)

Part C : Answer all questions
11. Explain latex preservation systems.
Or
12. Explain preparation of SBR latex.
13. Explain latex concentration by centrifuging.
Or
14. Explain latex concentration by creaming.
15. Explain different equipments used for the preparation of dispersions.
Or
16. Explain different compounding ingredients used in the latex industry.
17. Explain different dipping methods.
Or
18. Give suitable formulation for the manufacturing of Surgen’s glove. Justify the answer. Outline manufacturing of gloves.
19. Explain Dunlop process for latex foam production.
Or
20. Explain Talalay process for latex foam production 5X12=60

Database Management Systems

: (Regular)
Time: Three Hours
Maximum: 100 Marks
Part A :
Answer all questions briefly
Each question carries 3 marks
1. List the situations in which we not to use DBMS.
2. Why do we designate one of the candidate keys of a relation to be the primary key?
3. How does multilevel indexing improve the efficiency of searching an index file?
4. List two reasons why null values might be introduced into the database.
5. Explain ACID properties of a transaction.

Part B :
Answer all questions
Each question carries 5 marks
6. Discuss the main characteristics of the database approach and how it differs from traditional file systems.
7. Discuss the entity integrity and referential integrity constraints. Why is each considered important?
8. Differentiate between internal hashing and external hashing.
9. Define Boyce-Codd normal form. How does it differ from 3NF? Why is it considered a stronger form of 3NF?
10. Why concurrency control is needed?

Part C :
Answer any one full question from each module
Each full question carries 12 marks
Module I :
11. Explain Three schema architecture and data independence. Why do we need mappings between schema levels? How do different schema definition languages support this architecture?
Or

12. A university registrar’s office maintains data about the following entities: (a) courses, including number, title, credits, syllabus, and prerequisites; (b) course offerings, including course number, year, semester, section number, instructor(s), timings, and classroom; (c) students, including student-id, name, and program; and (d) instructors, including identification number, name, department, and title. Further, the enrollment of students in courses and grades awarded to students in each course they are enrolled for must be appropriately modelled.
Construct an E-R diagram for the registrar’s office. Document all assumptions that you make about the mapping constraints.

Module II :
13. Consider the following relations for a database that keeps track of student enrollment in courses and the books adopted for each course:
STUDENT(SSN, Name, Major, Bdate)
COURSE(Course#, Cname, Dept)
ENROLL(SSN, Course#, Quarter, Grade)
BOOK_ADOPTION(Course#, Quarter, Book_ISBN)
TEXT(Book_ISBN, Book_Title, Publisher, Author)
Specify the foreign keys for the above schema, stating any assumptions you make. Then specify the following queries in relational algebra:
a. List the number of courses taken by all students named ‘John Smith’ in Winter 1999 (i.e., Quarter = ‘W99’).
b. Produce a list of textbooks (include Course#, Book_ISBN, Book_Title) for courses offered by the ‘CS’ department that have used more than two books.
c. List any department that has all its adopted books published by ‘BC Publishing’.