GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Code: 2142601
GUJARAT TECHNOLOGICAL UNIVERSITY
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SEMESTER-IV(NEW) — EXAMINATION — SUMMER 2019
Subject Name: Rubber Compounding Materials
Time: 02:30 PM TO 05:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) List out the different organic materials used in Rubber Industry. | 03 |
| (b) How ozone will affect the properties of Rubber Products? | 04 | |
| (c) Explain the compounds of Aluminum used in rubber industry. | 07 | |
| Q.2 | (a) What do you mean by Bleeding? | 03 |
| (b) Give the classification of Rubber Additives. | 04 | |
| (c) Write a Short on “Accelerator”. | 07 | |
| OR | ||
| (a) List the name of Inorganic fillers. Explain any two in detail. | 07 | |
| Q.3 | (a) Write the different name of Processing oil used in Rubber Industries. | 03 |
| (b) List out the different blowing agent used in rubber Industries. | 04 | |
| (c) Explain the chain breaking mechanism of antioxidants. | 07 | |
| OR | ||
| (a) Write the different names of accelerator used in rubber Industries. | 03 | |
| Q.4 | (b) List out the different types of Factice used in Rubber Industries. Explain any one in brief. | 04 |
| (c) Write a short note on phenolic antioxidants. | 07 | |
| (a) Give the difference between Hard Clay & Soft Clay. | 03 | |
| Q.5 | (b) Write a brief note on Blue pigment. | 04 |
| (c) Short note on “Non Black Fillers”. | 07 | |
| OR | ||
| (a) Write the importance of Peptiset used in Rubber Industries. | 03 | |
| (b) Give the comparison between organic and inorganic pigments. | 04 | |
| (c) Calculate the specific gravity of compound used for manufacturing of rubber O ring. | 07 | |
| Q.5 | (a) Write difference between Compounding and Mixing. | 03 |
| (b) Give the influence of fillers characteristics on the cross linking process. | 04 | |
| (c) Explain the “Furnace process” of carbon black with flow diagram in detail. | 07 | |
| OR | ||
| (a) Explain in detail about mechanism of oxidation. | 03 | |
| (b) Give the importance of Filler used in Rubber Industries. | 04 | |
| (c) Explain the effect of properties of carbon black on properties of rubber Vulcanizates. | 07 |
Date: 17/05/2019
Total Marks: 70
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