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Posted By: Sra1 Member Level: Diamond Posted Date: 27 May 2008
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2007 Jawaharlal Nehru Technological University B.Tech Mechanical Engineering MACHINE TOOLS (Supplimentary Examinations, Aug/Sep 2007) Question paper
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Set No 3
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Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) What is tool signature? [4]
(b) Explain ASA and ORS system of tool nomenenclature. [6]
(c) Differentiate ORS and ASA system. [6]
2. (a) Describe different types of the tool posts used in lathe. [8]
(b) Sketch and describe different types of tool holders [8]
3. Write briefly about following holders used in capstan and turret lathes. [4x4=16]
(a) Multiple cutter holder
(b) Slide tool holder
(c) Knee tool holder
(d) Drill tool holder
4. (a) Differentiate between planer, slotter and shaper? [6]
(b) Describe constructional features of feed gearbox of shaper? [10]
5. (a) Explain clearly what is meant by boring? [6]
(b) Explain clearly with a neat sketch the construction and working principle of
a horizontal boring machine. [10]
6. (a) Explain the characteristics that distinguish a milling process from other ma-
chining processes. [8]
(b) Describe the differences between a lathe and milling machine in terms of the
types of surfaces generated , the types of tools used and applicability for
general and production applications. [8]
7. Describe in detail the various arrangements of centreless grinding with neat sketches.
Mention the applications in each case. [16]
8. (a) List the human factors involved in design of Jigs and Fixtures [8]
(b) What are the safety factors related to design of jigs and fixtures [8]
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