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Subject Code: 2132303
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (New) EXAMINATION - WINTER 2018
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Subject Name: Basic of Plastic Material Testing
Time: 10:30 AM TO 01:00 PM
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Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks
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| Q.1 | (a) Define specification. What is the purpose of specification? | 03 |
| (b) Define Testing. List reasons for Testing. | 04 | |
| (c) Explain the Tensile strength Test for plastics material in detail. | 07 | |
| OR | ||
| Q.1 | (a) Give full form of ASTM, ISO and SPI | 03 |
| (b) (1) List the material characterization tests. (2) Give any two examples of self extinguishing plastics material. | 04 | |
| (c) (3) Draw the test specimen with dimensions for tensile testing as per ASTM D 638. (4) MFI test is used to measure flow behavior of Thermosets.(True/False) | 07 | |
| Q.2 | (a) Explain Stress-Strain curve in detail. | 07 |
| OR | ||
| Q.2 | (a) List the specimen preparation techniques for thermoplastic. Explain about Injection Molding in detail. | 07 |
| Q.3 | (a) Define conditioning. List purpose of conditioning. | 03 |
| (b) What is Hygroscopic material? Give the name of Plastic materials which are Hygroscopic. | 04 | |
| (c) Explain the test method to determine Density of plastic material in detail. | 07 | |
| OR | ||
| Q.3 | (a) Explain standard Test method to determine Water Absorption of Plastics. | 07 |
| Q.4 | (a) List types of Impact tests. | 03 |
| (b) Define (1) Yield strength (2) Modulus of elasticity (3) Stress (4) Yield Point (5) strain (6) Elongation (7) Toughness | 04 | |
| (c) List the preliminary tests carried out for the simple identification of plastics. | 07 | |
| OR | ||
| Q.4 | (a) Width and thickness of tensile test specimen is 8mm and 3mm respectively. If tensile strength at break is 384 kg/cm². Calculate the load recorded at break. | 03 |
| (b) List the specimen preparation techniques for thermosets. Explain any one in detail. | 04 | |
| (c) Explain copper wire test for halogens. | 07 | |
| Q.5 | (a) (1) What is Standard Laboratory Atmosphere? --- Content provided by FirstRanker.com --- (2) Cup flow test and Spiral flow test is used to measure flow Behavior of Thermosets.(True/False) (3) Which plastic material produced metallic sound when dropped on hard surface? (a) PS (b) FPVC (c) Polyamides | 03 |
| (b) Define Flexural strength. List and explain the factors affecting the test result. | 04 | |
| (c) Define Melt flow index. Explain the test to determine melt flow behavior of plastic material in detail with factors affecting the test results. | 07 | |
| OR | ||
| Q.5 | (a) Calculate compressive strength of the specimen having Height 2.5 cm ,Length 1.4 cm and Width 1.4 cm.Load recorded at crushing is 525 kg. | 03 |
| (b) Short note: Abrasion resistance test | 04 | |
| (c) Define Hardness. Explain Rockwell hardness test in detail. | 07 |
Date: 05/12/2018
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