GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Subject Name: Basic Plastic Processing and Thermal Engineering
Time: 02:30 PM TO 05:00 PM Total Marks: 70
3. Figures to the right indicate full marks.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-1V (NEW) EXAMINATION - WINTER 2018
--- Content provided by FirstRanker.com ---
Subject Code: 2142301 Date: 22/11/2018Subject Name: Basic Plastic Processing and Thermal Engineering
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
--- Content provided by FirstRanker.com ---
2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
| MARKS | |||
| Q.1 | (a) | (1) What do you mean by breathing in compression molding? | 03 |
| (2) PET bottles are manufactured by process. | |||
| (3) Define conduction | |||
| (b) | (1) Define plastic processing. | 04 | |
| (2) Wastage is less in injection blow molding than extrusion blow molding. (True or False) | |||
| (3) What is a parison? | |||
| (4) Insert molding can be done by transfer molding process. (True/False) | |||
| (c) | Write a short note on plug assist vacuum forming technique. | 07 | |
| Q.2 | (a) | What is bulk factor? Explain in brief. | 03 |
| (b) | List four points of difference between thermoplastics & thermosets. | 04 | |
| (c) | List the advantages and disadvantages of rotational molding process. | 07 | |
| OR | |||
| (c) | Explain the plunger type transfer molding process with a neat sketch. | 07 | |
| Q.3 | (a) | List the steps in compression molding. | 03 |
| (b) | What are preforms? Advantages of preforms in compression molding. | 04 | |
| (c) | List the types of molds in compression molding and explain any one. | 07 | |
| OR | |||
| Q.3 | (a) | What is breathing and why is it important in compression molding process? | 03 |
| (b) | List the material characteristic require for thermoforming process. | 04 | |
| (c) | With a neat sketch explain pot type transfer molding process. | 07 | |
| Q.4 | (a) | List the types of heat exchanger and explain any one. | 03 |
| (b) | Explain the pressure forming process. | 04 | |
| (c) | Write a short note on parison programming. | 07 | |
| OR | |||
| Q.4 | (a) | Compare blow molding process with rotational molding. | 03 |
| (b) | What is Pinch-off in blow molding? | 04 | |
| (c) | Differentiate between injection blow molding and extrusion blow molding. | 07 | |
| Q.5 | (a) | List any three defects occurring in blow molding and give its causes and remedies. | 03 |
| (b) | Enlist the advantages and disadvantages of transfer molding process. | 04 | |
| (c) | Explain the Injection blow molding process. | 07 | |
| OR | |||
| Q.5 | (a) | Define convection & radiation. Explain Fourier’s law of heat transfer. | 03 |
| (b) | Explain rotational molding process briefly. | 04 | |
| (c) | Discuss the steps in compression molding process along with advantages and disadvantages. | 07 |
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University