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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – V • EXAMINATION – WINTER- 2016
Subject Code:3351903 Date: 25- 11- 2016
Subject Name: Manufacturing Engineering-III
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
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Q.1 Answer any seven out of ten. 14
1. Define Machine Tools
2. What is abrasive ?
3. List name of bonding material for grinding wheel
4. Why grinding wheel need balancing?
5. List advantages of Gear shaping process
6. Why gears are being finished ?
7. What is die electric fluid ?
8. What is Lithography?
9. What is chemical vapor deposition process?
10. Give equation for Broaching machine pulling capacity.
Q.2 (a) Draw the geometry of a single point cutting tool 03
OR
(a) Explain cutting action of Grinding wheel. 03
(b) Give difference between Trueing and dressing 03
OR
(b) List the finishing operations 03
(c) Describe way of specification for grinding wheel as per IS-Standard. 04
OR
(c) Give difference between Honing and Lapping process. 04
(d) Describe surface grinding process in detail 04
OR
(d) Describe center less grinding process in detail 04
Q.3 (a) Give classification of Gear manufacturing process. 03
OR
(a) Briefly explain Gear milling process. 03
(b) Draw sketch of Gear hob. 03
OR
(b) Write short note on thread chasing 03
(c) Explain Thread rolling process with neat sketch 04
OR
(c) Explain the principle of broaching with neat sketch. 04
(d) Describe Jig boring machine in detail 04
OR
(d) Explain Abrasive Jet Machining(AJM) with neat sketch 04
Q.4 (a) Give difference between Pull broaching and Push broaching 03
OR
(a) Write short note on Electro chemical machining 03
(b) Describe Ultra sonic machining (USM). 04
OR
(b) Describe need of micro-electro mechanical system.(MEMS) 04
(c) Give classification of Non conventional methods of machining and briefly explain any one. 07
Q.5 (a) Write short note on laser beam machining(LBM) 04
(b) Write the types of SPMs(Special purpose Machines) Why we need it? 04
(c)Explain thread cutting by die head. 03
(d) List the advantages and disadvantages of broaching process 03
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