GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE- SEMESTER-VII (NEW) EXAMINATION — WINTER 2020
Subject Code:2173603 Date:19/01/2021
Subject Name:Evaluation & Testing of Polymers & Rubber
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
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- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| MARKS | ||
|---|---|---|
| Q.1 | (a) Explain Glass Transition temperature? | 03 |
| (b) Explain in brief Fourier transform infrared spectrometry. | 04 | |
| (c) Write in detail about Gas chromatography? | 07 | |
| Q.2 | (a) Explain Surface Volume resistivity? | 03 |
| (b) Write in brief about Vicat Softening point. | 04 | |
| (c) Explain U- tube viscometer and Capillary viscometer in detail. | 07 | |
| Q.3 | (a) Explain in brief viscoelasticity. | 03 |
| (b) What is heat distortion temperature? Explain in detail. | 04 | |
| (c) Explain Environmental stress cracking resistance. | 07 | |
| Q.4 | (a) Explain hardness testing of rubber and what is its unit? | 03 |
| (b) Write about Dielectric strength and Arc Resistance. | 04 | |
| (c) Write about Scanning calorimeter with its applications. | 07 | |
| Q.5 | (a) Write about the usage of UV-spectrophotometer in chemical industry? | 03 |
| (b) Explain working principal of X-ray diffraction spectrometry. | 04 | |
| (c) What is Tensile strength? Explain in detail. | 07 | |
| Q.6 | (a) Explain the method to determine Glass transition temperature (Tg) by Differential Scanning Calorimeter (DSC). | 03 |
| (b) Explain notched impact strength testing of plastic material. | 04 | |
| (c) Explain Nuclear magnetic resonance spectrometry in detail. | 07 | |
| Q.7 | (a) Draw a diagram of Ubbelohde viscometer. | 03 |
| (b) Explain working principal of mass spectrometry. | 04 | |
| (c) Explain principle of UV — spectrophotometer with the help of diagram. | 07 | |
| Q.8 | (a) Explain fire rating and V0, V1 and V2 fire ratings. | 03 |
| (b) Explain flexural properties and write its significance. | 04 | |
| (c) Explain natural and accelerated weathering. Also describe working of Ozone chamber. | 07 |
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