Regulation : R09/R10 Code No: ME204/MT210
Vignan’s Foundation for Science, Technology and Research (Estd. U/s 3 of UGC Act of 1956)
II B.Tech II Semester Supplementary Examination, July 2013
(ME/MT)
Time: 3 hours Max. Marks : 60
Instructions: 1. Answer ONE question from each unit
2. All Questions carry equal marks
3. Assume missing data, if any
***
UNIT – I
1. a) What are the various types of pattern allowances? What is the significance of pattern maker’s Contraction rule or scale? Explain.
[6M] b) What are the essential requirements for Design of a gating system? Draw a neat sketch of gating system and mention the purpose of each element. [6M]
(OR)
2. a) What are the various types of patterns? Draw neat sketches and mention their applications.
[6M] b) Differentiate between pressurised and unpressurised gating system? Explain with neat sketches. [6M]
UNIT – II
3. a) With neat sketches explain the investment casting process. Also discuss the advantages and Limitations of this process. [6M] b) Explain with neat sketches the construction and operation of an electric arc furnace. [6M]
(OR)
4. a) With a neat sketch explain the construction and operation of a Cupola furnace. What are the chemical reactions taking place in various zones? [6M] b) Explain various casting defects, mentioning their causes and remedies. Also explain the liquid penetrant test for analyzing surface defects? [6M]
UNIT – III
5. a) Distinguish between spinning and cup drawing with reference to the processes and components produced. b) Distinguish between bending and drawing in sheet metal operations
[6M]
[6M]
6.
(OR) a) Differentiate between coining and embossing [6M] b) What is metal spinning? What types of components are generally manufactured by this process? [6M]
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Regulation : R09/R10 Code No: ME204/MT210
UNIT – IV
7. a) Explain with neat sketches various types of rolling mills? Also mention the advantages and Limitations [6M]
b) Differentiate between open die and closed die forging? How can you ensure
[6M] complete filling of the die cavity in closed die forging? Explain.
(OR)
8. Write short notes on the following: a) Hydrostatic extrusion process with neat sketch. b) Forging defects.
UNIT – V
9. a) Explain the submereged arc welding process with neat sketches. Also discuss the advantages, applications of this process. b) Explain the causes and remedies for various welding defects.
(OR)
[6M]
[6M]
[6M]
[6M]
10. a) Explain the MIG welding process with a neat sketch? Also discuss the features of power supply Used in MIG mentioning specific advantages and applications of the process. [6M] b) Explain the principle of arc welding. Differentiate between straight and reverse polarity. Also compare the merits and demerits of AC and DC Welding equipment. [6M]
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