Download GTU BE/B.Tech 2019 Winter 7th Sem New 2173603 Evaluation And Testing Of Polymers And Rubber Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019

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Subject Code: 2173603 Date: 23/11/2019
Subject Name: Evaluation & Testing of Polymers & Rubber
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Explain in brief viscoelasticity. 03
(b) What is heat distortion temperature? Explain in detail. 04

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(c) Explain Environmental stress cracking resistance. 07

Q.2 (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

OR

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(c) What is viscosity? Explain Rotating viscometer method in detail. 07

Q.3 (a) Explain Glass Transition temperature? 03
(b) Explain in brief Fourier transform infrared spectrometry. 04
(c) Write in detail about Gas chromatography? 07

OR

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Q.3 (a) Explain hardness testing of rubber and what is its unit? 03
(b) Write about Dielectric strength and ArcResistance. 04
(c) Write about Scanning calorimeter with its applications. 07

Q.4 (a) Explain Surface Volume resistivity? 03
(b) Write in brief about Vicat Softening point. 04

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(c) Explain U- tube viscometer-and Capillary viscometer in detail. 07

OR

Q.4 (a) Explain the method to determine Glass transition temperature (Tg) by 03
Differential Scanning Calorimeter (DSC).
(b) Explain notched impact strength testing of plastic material. 04

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(c) Explain Nuclearmagnetic resonance spectrometry in detail. 07

Q.5 (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

OR

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Q.5 (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 07
Ozone chamber.

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