Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2162604 Characterisation Of Rubber Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2162604 Date:18/05/2019
Subject Name:Characterisation of 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.
Q.1 (a) List out the chemicals which are used in determination of free sulphur present in
vulcanizate.
03
(b) Write about the different test specimen preparation methods. 04
(c) Discuss in detail about the classification of standards. 07
Q.2 (a) Which characteristic information related to rubber is obtained by Wide Angle X-ray
Scattering?
03
(b) Write about main difficulties in exploitation of Transmission Electron Microscopy. 04
(c) Explain the given features with respect to Electron Microscopy:(i) Secondary Electrons(ii)
Back Scattered Electrons
07
OR
Q.2 (c) Discuss in detail about the relaxation behavior of excited atoms with respect to Scanning
Electron Microscopy (SEM).
07
Q.3 (a) Define the given terms:(i)Endothermic Peak (ii)Exothermic Peak (iii)Peak Width 03
(b) Write down the characteristics of good thermobalance design. 04
(c) Discuss in detail about the different transitions which are observed in standard Dynamic
Mechanical Analysis(DMA) curve of rubber.
07
OR
Q.3 (a) Define the given terms: (i)Peak Height (ii)Peak Area (iii)extrapolated Onset 03
(b) Which different types of probe geometries are used in Thermomechanical Analysis (TMA)
of rubber?
04
(c) Differential Thermal Analysis is the best tool to propose a mechanism of crosslinking-
Justify this statement with suitable example of rubber.
07
Q.4 (a) Write about types of columns used in Gas Chromatography. 03
(b) List the types of detectors used in High Performance Liquid Chromatography. Write on
any one.
04
(c) Discuss in detail about the principle and separation mechanism of Gel Permeation
Chromatography(GPC)
07
OR
Q.4 (a) Which sample injection systems are used in Gas Chromatography? 03
(b) Write in brief on instrumentation of High Performance Liquid Chromatography (HPLC). 04
(c) Discuss in detail about the preparatory and operational steps of Thin Layer
Chromatography (TLC).
07
Q.5 (a) Write a note on ?fingerprint region?. 03
(b) Write a short note on single beam UV-Spectrophotometer. 04
(c) Discuss in detail about Beer-Lambert?s law. 07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2162604 Date:18/05/2019
Subject Name:Characterisation of 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.
Q.1 (a) List out the chemicals which are used in determination of free sulphur present in
vulcanizate.
03
(b) Write about the different test specimen preparation methods. 04
(c) Discuss in detail about the classification of standards. 07
Q.2 (a) Which characteristic information related to rubber is obtained by Wide Angle X-ray
Scattering?
03
(b) Write about main difficulties in exploitation of Transmission Electron Microscopy. 04
(c) Explain the given features with respect to Electron Microscopy:(i) Secondary Electrons(ii)
Back Scattered Electrons
07
OR
Q.2 (c) Discuss in detail about the relaxation behavior of excited atoms with respect to Scanning
Electron Microscopy (SEM).
07
Q.3 (a) Define the given terms:(i)Endothermic Peak (ii)Exothermic Peak (iii)Peak Width 03
(b) Write down the characteristics of good thermobalance design. 04
(c) Discuss in detail about the different transitions which are observed in standard Dynamic
Mechanical Analysis(DMA) curve of rubber.
07
OR
Q.3 (a) Define the given terms: (i)Peak Height (ii)Peak Area (iii)extrapolated Onset 03
(b) Which different types of probe geometries are used in Thermomechanical Analysis (TMA)
of rubber?
04
(c) Differential Thermal Analysis is the best tool to propose a mechanism of crosslinking-
Justify this statement with suitable example of rubber.
07
Q.4 (a) Write about types of columns used in Gas Chromatography. 03
(b) List the types of detectors used in High Performance Liquid Chromatography. Write on
any one.
04
(c) Discuss in detail about the principle and separation mechanism of Gel Permeation
Chromatography(GPC)
07
OR
Q.4 (a) Which sample injection systems are used in Gas Chromatography? 03
(b) Write in brief on instrumentation of High Performance Liquid Chromatography (HPLC). 04
(c) Discuss in detail about the preparatory and operational steps of Thin Layer
Chromatography (TLC).
07
Q.5 (a) Write a note on ?fingerprint region?. 03
(b) Write a short note on single beam UV-Spectrophotometer. 04
(c) Discuss in detail about Beer-Lambert?s law. 07
2
OR
Q.5 (a) Which information related to rubber is obtained by Infrared Spectroscopy? 03
(b) Write a short note on double beam UV-Spectrophotometer. 04
(c) Discuss applications of Fourier Transform Infrared Spectroscopy with suitable case study
of rubber and related material.
07
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This post was last modified on 20 February 2020