Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2162601 Rubber Compound And Product Testing Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2162601 Date:10/05/2019
Subject Name:Rubber Compound & Product Testing
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) Write a brief note on method-A to determine the dimensions of product. 03
(b) Why is it necessary to carry out the testing at different conditions? Also
give the limitations of test result.
04
(c) Discuss in detail about the purposes of testing. 07
Q.2 (a) Define the term PRI with its formula. Also give practical significance
of PRI test.
03
(b) What do you mean by green shrinkage? How is it determined? 04
(c) Explain in detail about the principle of measuring micro hardness. 07
OR
(c) Write short note on ?Durometer test?. 07
Q.3 (a) Draw the appropriate diagram of the device for compression set under
constant deflection. Write the major components of the same.
03
(b) Differentiate the terms ?wear? and ?abrasion?. List the different types of
wear mechanism with their example.
04
(c) Explain in detail about the basic elements of tensile machine with the
standard test procedure.
07
OR
Q.3 (a) Write the significance and use of compression set test. 03
(b) Describe the working of ?Akron? and ?Du Pont? type of arrangements
for abrasion test.
04
(c) Discuss in detail about the different variations in form of test piece for
tear test.
07
Q.4 (a) Draw the labeled diagram of vertical rebound apparatus. 03
(b) Write the significance and calculation for the measurement of retraction
at lower temperature.
04
(c) Discuss in detail about the interpretation of results for the measurement
of resistance to flex-cracking by De Mattia tester.
07
OR
Q.4 (a) Write the standard procedure to determine rebound resilience by
vertical rebound apparatus.
03
(b) What is the standard procedure for the measurement of retraction at
lower temperature?
04
(c) Explain in detail about the apparatus and standard procedure for the
measurement of resistance to flex-cracking by De Mattia tester.
07
Q.5 (a) Write a brief note on ASTM reference fuels. 03
(b) Draw a neat diagram of electrode assembly used to measure the volume
resistivity.
04
(c) Explain the term permeability. Discuss the constant volume method to
study permeability behavior of vulcanizate.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2162601 Date:10/05/2019
Subject Name:Rubber Compound & Product Testing
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) Write a brief note on method-A to determine the dimensions of product. 03
(b) Why is it necessary to carry out the testing at different conditions? Also
give the limitations of test result.
04
(c) Discuss in detail about the purposes of testing. 07
Q.2 (a) Define the term PRI with its formula. Also give practical significance
of PRI test.
03
(b) What do you mean by green shrinkage? How is it determined? 04
(c) Explain in detail about the principle of measuring micro hardness. 07
OR
(c) Write short note on ?Durometer test?. 07
Q.3 (a) Draw the appropriate diagram of the device for compression set under
constant deflection. Write the major components of the same.
03
(b) Differentiate the terms ?wear? and ?abrasion?. List the different types of
wear mechanism with their example.
04
(c) Explain in detail about the basic elements of tensile machine with the
standard test procedure.
07
OR
Q.3 (a) Write the significance and use of compression set test. 03
(b) Describe the working of ?Akron? and ?Du Pont? type of arrangements
for abrasion test.
04
(c) Discuss in detail about the different variations in form of test piece for
tear test.
07
Q.4 (a) Draw the labeled diagram of vertical rebound apparatus. 03
(b) Write the significance and calculation for the measurement of retraction
at lower temperature.
04
(c) Discuss in detail about the interpretation of results for the measurement
of resistance to flex-cracking by De Mattia tester.
07
OR
Q.4 (a) Write the standard procedure to determine rebound resilience by
vertical rebound apparatus.
03
(b) What is the standard procedure for the measurement of retraction at
lower temperature?
04
(c) Explain in detail about the apparatus and standard procedure for the
measurement of resistance to flex-cracking by De Mattia tester.
07
Q.5 (a) Write a brief note on ASTM reference fuels. 03
(b) Draw a neat diagram of electrode assembly used to measure the volume
resistivity.
04
(c) Explain the term permeability. Discuss the constant volume method to
study permeability behavior of vulcanizate.
07
2
OR
Q.5 (a) Write a brief note on ASTM reference oil. 03
(b) Describe the given terms: (i) Volume Resistivity (ii) Surface Resistivity 04
(c) Explain the term solubility constant. Discuss the constant pressure
method to study permeability behavior of vulcanizate.
07
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This post was last modified on 20 February 2020