GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Code: 182503
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VIII (OLD) EXAMINATION - SUMMER 2019
Subject Name: Design of Product And Machine Tools
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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- Q.1 (a) Explain various Elementary transmission methods for Transforming rotary motion into Translatory. (07)
- Q.1 (b) Explain various devices for Intermittent motion. (07)
- Q.2 (a) Explain the general requirements for Machine tool design. (07)
- Q.2 (b) With neat sketch explain following gear box: (1) Norton's gear (2) Feed box with gear cone & sliding key (07)
- Q.3 (a) OR Design hydrodynamic journal bearing for a shaft of blower for following data: Bearing Load due to belt force: 3000N, Bearing Load due to weight of rotor: 600N, Speed of Blower: 600 rpm, diameter of shaft: 50 mm, Expected temperature of 0il:70°, ambient temperature: 30°, c/d ratio - 0.0015, Minimum film thickness: 0.019 mm Calculate: actual attitude, type of oil used, power loss, heat generated, actual minimum film thickness. (07)
- Q.3 (b) Discuss various types of Bed structure and wall arrangements and their applications with neat sketch. (07)
- Q.4 (a) Explain the design procedure of Slideways for wear resistance. (07)
- Q.4 (b) OR Explain various Slideways profile with-neat sketch and application. (07)
- Q.5 (a) Explain various methods to adjust the clearance in slide ways? (07)
- Q.5 (b) Write a note on Antifriction/Guideways. Explain Open type and Close type antifriction guideways. (07)
- Q.6 (a) Explain: Preloading of Antifriction bearing. (07)
- Q.6 (b) OR State advantage and disadvantage of Hydrodynamic and Hydrostatic bearing. Discuss where each one is more suitable. (07)
- Q.7 (a) Design crane hook for lifting capacity of 12 tonnes, having triangular section. Take permissible tensile stress as 130 N/mm?2 for forged steel. (07)
- Q.7 (b) Enlist and explain any seven factors to be considered for preparing product design specification for Fully Automatic dish washer. (07)
- Q.8 (a) Design a self-aligning ball bearing for a radial load of 7000 N and a thrust load of 2100 N. The desired life of the bearing is 160 millions of revolutions at 300 r.p.m. Assume uniform and steady load. (07)
- Q.8 (b) OR Discuss various factors to be considered for prepare a product design specifications. Give classification of steel wire ropes. How numbers of band are determined for steel wire ropes while designing material handling systems? (07)
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Date: 13/05/2019
Total Marks: 70
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