Download GTU BE/B.Tech 2018 Winter 6th Sem New 2162601 Rubber Compound And Product Testing Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI (NEW) EXAMINATION - WINTER 2018

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Subject Code: 2162601 Date:16/11/2018
Subject Name: Rubber Compound & Product Testing
Time: 02:30 PM TO 05:00 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.

Q.1 (a) List the basic requirements of testing equipment. 03
(b) Give the classification of tests. Write about its relation with the 04 purpose of testing.
(c) Discuss in detail about principle of compression plastimeter. 07

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Q.2 (a) Which are the different standard methods to measure dimension of test 03 piece? Write their measuring range.
(b) Write down the full form of IRHD. Discuss the hardness measurement 04 of rubber product using IRHD apparatus.
(c) Discuss in detail about the tensile test. 07

OR

(c) Discuss in detail about the tear test. 07

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Q.3 (a) What are the significance and use of compression set test? 03
(b) Write about the relation between swelling and time. 04
(c) Discuss in detail about the vertical rebound test. 07

OR

Q.3 (a) Draw the schematic diagram of device for compression set under 03 constant deflection.

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(b) Write in brief about the ASTM oil and ASTM fuels. 04
(c) Explain in detail about the different types of pendulum geometry for 07 rebound resilience test.

Q.4 (a) Describe the term surface resistivity with suitable diagram. 03
(b) Define the terms ‘abrasion’ and ‘wear’. Give the different types of 04 wear mechanism with their example.
(c) Write in brief about the types of fatigue test. List the major 07 components of ross flexing machine with labeled diagram.

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OR

Q.4 (a) Define the terms: (i) Antistatic Rubber (ii) Conductive Rubber (iii) 03 Insulating Rubber
(b) Draw any two arrangements for abrasion test and write about the 04 same.
(c) Discuss in detail about the types of cracks observed in flex-cracking 07 resistance test conducted on De-MATTIA apparatus.

Q.5 (a) Show the relation between crack size and strain for the measurement 03 of effect of ozone.

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(b) Give the significance and calculation for the measurement of retraction 04 at lower temperature.
(c) Discuss in detail about the constant volume method to measure the 07 permeability of rubber product.

OR

Q.5 (a) Write the preferred testing conditions during the ozone ageing. 03
(b) Write the standard procedure for the measurement of retraction at 04 lower temperature.

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(c) Explain in detail about the principle of carrier gas method to measure 07 gas permeability.

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