Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2173603 Evaluation And Testing Of Polymers And Rubber Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2173603 Date: 15/11/2018
Subject Name: Evaluation & Testing of Polymers & Rubber
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Write a note on UTM. 03
(b) Elaborate viscoelastic behavior of rubbers. 04
(c) Explain Relative, Specific , Reduced, Inherent, Intrinsic
Viscosity and Fatigue Resistance
07
Q.2 (a) Explain Vicat softening temperature. 03
(b) Describe method of determination of Melt Flow Index of
Themoplastic materials
04
(c) Discuss XRD in detail. 07
OR
(c) Write short note on: (i) Brookfield rheometer (ii) Cone and
plate flow
07
Q.3 (a) Define Impact resistance. Mention its usefulness. Also draw
a typical stress-strain curve of: polystyrene, HIPS and natural
rubber
03
(b) Describe the method for determination of viscosity
average molecular weight of polymers.
04
(c) Write in details about the importance of testing of
polymers and rubber.
07
OR
Q.3 (a) Define : storage modulus, loss modulus and tan? 03
(b) How is Hardness of polymer/rubber determined? Mention
with Types
04
(c) Draw instrumentation diagram of UV spectroscopy, write
its principle and applications.
07
Q.4 (a) Define glass transition temperature of polymers. Describe
briefly method of determination of Tg
03
(b) Explain DSC with Curve. 04
(c) Explain limiting oxygen index with neat sketch 07
OR
Q.4 (a) Explain following terms: breakdown voltage, Arc
resistance
03
(b) Write difference between melting temperature &
softening temperature?
04
(c) What information do you get from following test? Mention
their usefulness in product design: DSC, Izod and Charpy
test?.
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2173603 Date: 15/11/2018
Subject Name: Evaluation & Testing of Polymers & Rubber
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Write a note on UTM. 03
(b) Elaborate viscoelastic behavior of rubbers. 04
(c) Explain Relative, Specific , Reduced, Inherent, Intrinsic
Viscosity and Fatigue Resistance
07
Q.2 (a) Explain Vicat softening temperature. 03
(b) Describe method of determination of Melt Flow Index of
Themoplastic materials
04
(c) Discuss XRD in detail. 07
OR
(c) Write short note on: (i) Brookfield rheometer (ii) Cone and
plate flow
07
Q.3 (a) Define Impact resistance. Mention its usefulness. Also draw
a typical stress-strain curve of: polystyrene, HIPS and natural
rubber
03
(b) Describe the method for determination of viscosity
average molecular weight of polymers.
04
(c) Write in details about the importance of testing of
polymers and rubber.
07
OR
Q.3 (a) Define : storage modulus, loss modulus and tan? 03
(b) How is Hardness of polymer/rubber determined? Mention
with Types
04
(c) Draw instrumentation diagram of UV spectroscopy, write
its principle and applications.
07
Q.4 (a) Define glass transition temperature of polymers. Describe
briefly method of determination of Tg
03
(b) Explain DSC with Curve. 04
(c) Explain limiting oxygen index with neat sketch 07
OR
Q.4 (a) Explain following terms: breakdown voltage, Arc
resistance
03
(b) Write difference between melting temperature &
softening temperature?
04
(c) What information do you get from following test? Mention
their usefulness in product design: DSC, Izod and Charpy
test?.
07
2
Q.5 (a) Write short note on Weathering resistance 03
(b) Explain in detail about Thermo Gravimetric Analysis
(TGA).
04
(c)
What are the major applications of UV, IR, and NMR
spectroscopy?
07
OR
Q.5 (a) What is Smoke Toxicity Test? 03
(b) Describe the working principle of GPC method used to
determine Molecular Weight of Polymers
04
(c) Define the following:
Elongation-at-break, Strain, Ultimate tensile strength, Yield
Strength, Proportional Limit, Modulus of Elasticity,
Toughness.
07
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This post was last modified on 20 February 2020