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Posted By: Sra1 Member Level: Gold 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 2
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Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Determine undeformed chip thickness during metal cutting operation With neat sketch [6]
(b) Differentiate orthogonal cutting of first kind and second kind? [4]
(c) Describe the role of various alloying elements in tool steels? [6]
2. (a) What are mandrels and why are they used? [8]
(b) Describe the construction and use of different types of mandrels. [8]
3. Describe single spindle automatic in detail with help of neat sketch. [16]
4. (a) With help of neat sketch describe main parts of slotter. [10]
(b) How is slotter machine is specified? Explain [6]
5. (a) Explain the various operations that can be performed on a drilling machine [8]
(b) Write a brief note a vertical boring mill. [8]
6. (a) Briefly explain some of the problems caused in milling. Give their causes and remedies. [8]
(b) What are the motions of the arbor mounted milling cutter has with respect to the work piece? Discuss [8]
7. Write a short note on the following [4x4=16]
(a) Brazed carbide tools
(b) Grade of grinding wheel
(c) Geometry of a single point turning tool
(d) Surface grinding machines
8. (a) What is the best method to locate a rough surface? [6]
(b) What are the causes of errors in the design and operation of jigs and fixtures?
What measures should be taken to minimize the effects of the causes of errors? [10]
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