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Posted By: Nitin Bajaj - Editor Member Level: Diamond Posted Date: 28 Mar 2008
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2007 Jawaharlal Nehru Technological University B.Tech MACHINE TOOL ENGINEERING (Production Engineering) - Set 4 Question paper
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II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2007 MACHINE TOOL ENGINEERING (Production Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
1. (a) Explain di?erent types of chips. (b) What are the adverse e?ects of built up edge? How can we avoid them?
2. (a) What are mandrels and why are they used? (b) Describe the construction and use of di?erent types of mandrels.
3. Describe brie?y about following holders used in capstan lathe. (a) Knurling tool holder (b) Tap holder (c) Recessing tool holder (d) V-steady box tool holder
4. (a) With help of neat sketch describe main parts of slotter. (b) How is slotter machine is speci?ed? Explain [10] [6] [8] [8] [8] [8] [4x4=16]
5. (a) What is the general rule regarding the included angle of the drill point and the hardness of the material being drilled? [6] (b) What is taper control drilling? Why the spiral point drilling is particularly adequate for this? [6] (c) What is the advantage of using a drill Jig for mass production? [4]
6. (a) What are the di?erences between bed type and planar type milling machine. [8] (b) List the various precautions in use of milling cutters. [8]
7. (a) What are the various abrasive machining operations you are familiar with? Explain their applications & limitations. [8] (b) What for lapping is used? How much stock is left for lapping? How does it di?er from grinding? What are its advantages and disadvantages? [8]
8. (a) What is lapping? What are its advantages? (b) Write a brief note on the following i. Equalising lapping ii. Form lapping
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