GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Metal Working Processes
Time: 10:30 AM TO 01:00 PM
Date: 28/11/2019
Total Marks: 70
Subject Code: 2172108
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019Subject Name: Metal Working Processes
Time: 10:30 AM TO 01:00 PM
Date: 28/11/2019
Total Marks: 70
--- Content provided by FirstRanker.com ---
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | (a) | What is the role of friction hill in rolling? | MARKS | 03 |
| (b) | Briefly explain the mechanics of metal working. | 04 | ||
| (c) | Draw engineering stress strain diagram for ductile and brittle material with suitable example and differentiate between true stress and engineering stress. | 07 | ||
| Q.2 | (a) | What do you mean by workability? | 03 | |
| (b) | What is the importance of preform design in forging? Write general rules for close die design. | 04 | ||
| (c) | Classify metal forming processes based on the type of force applied on to the work piece as it is formed into shape. Explain any two processes in detail. | 07 | ||
| OR | ||||
| Q.3 | (a) | Why Von Mises yield criterion is more accurate to describe actual situations than Tresca yield criterion? Explain. | 07 | |
| (b) | What is the importance of back and front tensions in sheet rolling? | 03 | ||
| (c) | With figure show the typical arrangement of rollers in rolling mills. | 04 | ||
| Q.4 | (a) | Explain recovery, recrystallization and grain growth. What are their effects on rolling? | 07 | |
| OR | ||||
| Q.4 | (b) | Define the terminology: bloom, billet and slab. | 03 | |
| (c) | Discuss any two rolling defects with their causes and remedies. | 04 | ||
| Q.5 | (a) | Define rolling and explain neutral point and angle of bite. Draw different rolling mills with neat sketch and label it. | 07 | |
| (b) | What is the function of flash in forging? | 03 | ||
| (c) | Discuss about wire drawing variables. | 04 | ||
| Q.5 | (a) | Classify tube drawing processes. Explain them with neat sketch. | 07 | |
| OR | ||||
| Q.5 | (b) | Define the term: Edging, Fullering and Swaging. | 03 | |
| (c) | Classify forging hammer and press. Discuss with diagram for energy restricted. | 04 | ||
| Q.5 | (a) | Define forging and compare open die and close die forging. | 07 | |
| (b) | What is extrusion ratio? What is the extrusion ratio for steel and aluminum? | 03 | ||
| (c) | What are the die materials and their manufacturing processes? | 04 | ||
| Q.5 | (a) | What is extrusion? Explain different extrusion process and explain role of lubricant. | 07 | |
| OR | ||||
| Q.5 | (b) | What is the full form of FEM? What is the importance of it? | 03 | |
| (c) | Explain briefly deep drawing process with figure. | 04 | ||
| Q.5 | (a) | With neat sketch discuss shearing and stretch forming. | 07 |
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