GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VIII (New) EXAMINATION — WINTER 2019
Subject Code: 2182503 Date: 21/11/2019
Subject Name: Design of Product and Machine Tools
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.
- Use of Design Data book is permitted
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| Q.1 | (a) Explain the classification of the speed box. | 03 |
| (b) Differentiate between hydraulic transmission and mechanical transmission. | 04 | |
| (c) With neat sketch explain following gear box: (1) Feed box with tumbler gear (2) Feed box with change gear. | 07 | |
| Q.2 | (a) Explain the materials of spindles. | 03 |
| (b) Describe the functions and requirements of spindle unit. | 04 | |
| (c) List causes of failure of antifriction bearings. Give comparison between journal and antifriction bearing. | 07 | |
| OR | ||
| (c) Design hydrodynamic journal bearing for lathe spindle from following data: Load on spindle: 20 kN, Speed of Spindle: 2000 rpm, diameter of spindle at journal: 100 mm, 1/d = 2, Clearance ratio: 2x10-3, viscosity of oil at working temperature = 35 x 10-3 kg/m.s Calculate: bearing characteristic number. | 07 | |
| Q.3 | (a) What is the purpose of guideways ? | 03 |
| (b) Write a short note on Antifriction Guide ways. | 04 | |
| (c) Give requirement of ‘Protecting devices for slide ways and explain various types of protecting devices with neat sketch. | 07 | |
| OR | ||
| Q.3 | (a) Explain the general requirements of column structure. | 03 |
| (b) Discuss various types of Bed structure and wall arrangements and their applications with neat sketch. | 04 | |
| (c) Explain the shapes of slide ways. | 07 | |
| Q.4 | (a) State the important properties of material used for hook. | 03 |
| (b) Discuss design procedure of wire rope sheave. | 04 | |
| (c) Design the crane hook for the lifting capacity of 10 tonnes, having triangular section. Take permissible tensile stress 120 N/mm2 for forged steel. | 07 | |
| OR | ||
| Q.4 | (a) How does the design of sheave and pulley differ? | 03 |
| (b) Give classification of lay of steel wire ropes. | 04 | |
| (c) Design the crane hook for the lifting capacity of 12 tonnes, having triangular section. Take permissible tensile stress 130 N/mm2 for forged steel. | 07 | |
| Q.5 | (a) Discuss steps involved in product design process. | 03 |
| (b) What are the challenges of product development? | 04 | |
| (c) You are selected as Product design and development engineer in SAMSUNG washing machine manufacturing company .To develop a new model of washing machine is a work assign to you. How will you attempt this task? While developing the model which parameters you will consider. | 07 | |
| OR | ||
| Q.5 | (a) Define the term ‘Product’ and explain the classification of product giving suitable examples. | 03 |
| (b) How the customer’s needs are focused during product development stages. | 04 | |
| (c) You are appointed as a senior engineer (Product design) in a TATA's Voltas Air condition manufacturing company. It is required to develop a new improved model of AC. How will you carry out the work assign to you? | 07 |
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