GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Code: 2141403
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-IV(NEW) —- EXAMINATION - SUMMER 2019
Subject Name: Materials & Manufacture of Food Equipment
Date: 17/05/2019
Time: 02:30 PM TO 05:00 PM
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks
- Drawing sheet to be provided to the students.
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| MARKS | ||
|---|---|---|
| Q.1 (a) | How is the yield strength of the material determined? | 03 |
| (b) | Discuss the ductility and brittleness property with help of stress strain diagram. | 04 |
| (c) | Draw and explain isomorphous phase diagram. Also explain the method for the determination of the phase composition and amount using the lever rule. | 07 |
| Q.2 (a) | What are different quenching media used for heat treatment of metals | 03 |
| (b) | What the different types of welding flames? Write important features of each. | 04 |
| (c) | Discuss the important safety measures for the construction and fabrication of food equipment with suitable example. | 07 |
| OR | ||
| (a) | Draw and explain the stress strain curve for a material subjected to tensile stress. | 07 |
| (b) | Explain toughness and stiffness property of material. | 03 |
| (c) | What are the stages of heat treatment process? | 04 |
| Q.3 (a) | Describe the changes in the crystal structure of iron-carbon system with change in temperature. Explain the isothermal reactions indicated by the horizontal lines on iron-iron carbide phase diagram. | 07 |
| OR | ||
| (b) | Explain briefly the components of explosion welding process. | 03 |
| (c) | What is fusion welding? Explain any one fusion welding process in detail. | 04 |
| Q.4 (a) | What is annealing? Explain the types of annealing process in detail. | 07 |
| (b) | Differentiate between first angle and third angle method of projection. | 03 |
| (c) | What are the conventions to draw sectional views? Name types of sectional views. Write a short note on removed sectional view. | 04 |
| (a) | Draw front and top view of given object using first angle method of projection. | 07 |
| OR | ||
| Q.4 (a) | Define the followings:
| 03 |
| (b) | Draw sectional front view of object given below | 04 |
| (c) | Enlist types of screw threads. Write down steps to draw hexagonal bolt and draw an hexagonal bolt having B = 50 mm and L=80 mm. | 07 |
| Q.5 (a) | Define pitch, lead and crest. | 03 |
| (b) | Explain how internal and external screw threads are schematically represented? | 04 |
| (c) | Explain about agglomerated material. | 07 |
| OR | ||
| Q.5 (a) | Sketch neatly knuckle or pin joint. | 03 |
| (b) | Classify keys. Sketch woodruff and peg key. | 04 |
| (c) | What is degree of polymerization? Describe in detail about condensation polymerization also mention applications of polymers in food industries. | 07 |
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