Download VTU BE 2020 Jan ME Question Paper 17 Scheme 3rd Sem 17MEA305 Metal Casting and Welding

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Time: 3 hrs. Max. Marks: 100

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Note: Answer any FIVE full questions, choosing ONE full question from each in odule.
Module-1
1 a. What is casting? Briefly discuss steps involved in making of castings. (10 Marks)
b. What is pattern? List the types and explain the following with neat sketches:
(i) Match plate pattern (ii) Two piece pattern (10 Marks)

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OR
2 a. Enumerate the desirable properties of molding sand. (10 Marks)
b. Explain the different steps involved in shell molding process and mention advant ages.
(10 Marks)
Module-2

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3 a. Describe with a neat sketch, Thixo casting process and mention its merits, limitations,
applications. (10 Marks)
b. What is die casting? With neat sketch explain the hot die casting process. (10 Marks)
OR
4 a. Classify melting furnaces. Explain with a neat sketch the working of a direct-arc electric

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furnace. (10 Marks)
b. What are the zones in cupola? With a neat sketch, explain cupola furnace. (10 Marks)
Module-3
5 a. Define solidification and explain the methods available to achieve directional solidification
with sketches. (12 Marks)

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b. Explain different sand casting defects, its causes and remedies. (08 Marks)
OR
6 a. Explain melting of aluminum using stir casting setup. (10 Marks)
b. What is Degasification in liquid metals? Explain the methods of degasification with neat
sketches. (10 Marks)

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Module-4
7 a. Sketch and explain metal arc inert gas welding and its advantages and disadvantages.
(10 Marks)
b. What is the principle of resistance welding? Explain projection welding with sketch.
(10 Marks)

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OR
8 a. With a neat sketch explain the principle, process of LASER welding and mention its
advantages. (10 Marks)
b. Explain the Thermit welding with a neat sketch. (10 Marks)
Module-5

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9 a. With neat sketch, explain Heat Affected Zone (HAZ) and its various zones. (10 Marks)
b. What are welding defects? Explain the methods to detect the welding defects. (10 Marks)
OR
Explain with a sketch, principle of oxy-acetylene gas welding.
?

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(08 Marks)
Differentiate between Soldering and Brazing. (04 Marks)
,
Explain the methods used for inspection of casting and welding"?
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