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Posted Date: 25 Jun 2009 Posted By: Sree.... Member Level: Platinum
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2008 Andhra Pradesh State Jawaharlal Nehru Technological University Code No: RR410309 IV B.Tech I Semester Supplimentary Examinations, November 2008 UNCONVENTIONAL MACHINING PROCESS [Set No. 3] Question paper
Code No: RR410309 Set No. 3
IV B.Tech I Semester Supplimentary Examinations, November 2008
UNCONVENTIONAL MACHINING PROCESS
( Common to Mechanical Engineering and Production Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. Describe the effects of the following machining parameters on the material removal
rate in Ultrasonic machining.
(a) Viscosity of fluid in slurry [8]
(b) Mean grain diameter [8]
2. (a) Explain the principle used in abrasive water jet machine. [8]
(b) Explain the characteristics of water jet cutting process. [8]
3. (a) Compare Electro Chemical Machining with a single point machining and de-
scribe the differences. [4+4=8]
(b) What are the limitations and industrial applications of Electro Chemical Ma-
chining? [4+4=8]
4. (a) What is the influence of Electro Chemical Machining on the Mechanical prop-
erties of machined components.? [8]
(b) Comment on the fatigue strength of machined components in Electro Chemical
Machining. Describe the methods tailored to improve fatigue strength. [4+4]
5. Explain how to sink a square blind hole in tungsten work electrode using copper
as tool electrode using E.D.M. [16]
6. (a) What are the advantages and disadvantages of E.D.M. process -explain in
detail. [4+4]
(b) With neat sketch, explain the closed loop hydraulic circuit used in E.D.M.
process. [4+4]
7. (a) Discuss the main industrial applications of plasma cutting systems. [8]
(b) What are the advantages and disadvantages of plasma cutting process? [4+4]
8. With the help of a neat sketch explain the construction, principle of operation,
advantages, disadvantages and applications of expanding type of electro-magnetic
forming process. [3+3+3+3+4]
1 of 1
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