Visvesvaraya Technological University (VTU) 2006 B.E Mechanical Engineering Foundry technology - Question Paper

ans any 5 ques..
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1.a)explain the tech. and economic characteristics in the selection of castings. (10M)
b)list and briefly discuss the cast metal properties needed as a basis for design of casting.(10M)

2.a)with sketches discuss how castings can be designed for: minimum casting stresses considering engineering aspects of casting geometry and metal flow considering factors affecting it. (8M)
b)explain briefly the machining factors in casting design for steel and cast iron. (6M)
c)list a few important design data for cast alloys and sources for getting it. (6M)

3.a)with neat sketches discuss 3 kinds of trends and applications of the identical.what are the various trend allowances? (8M)
b)with a neat sketch discuss the core prints,their purpose and method of calculating core print dimensions. (6M)
c)explain with neat sketch the shape involved in making a trend layout. (6M)

4.a)explain with specific examples the use of cad and cam concept for trend manufacturing and provide its advantages. (10M)
b)list the function of cores.explain with sketches the various kinds of core boxes and kinds of cores made from them. (10M)

5.a)explain and compare the crystallization and development of cast metal structures of pure metals and alloys. (8M)
b)what is grain refinement and modification?briefly discuss practical measures for the identical. (6M)
c)what are the principal governing factors for final metallographic structures of castings? (6M)

6.a)with a neat sketch discuss what is progressive solidification and directional solidification. (10M)
b)what is eutectic freezing and kind of micro structure obtained? (4M)
c)explain chvorinov's rule and its significance and limitations. (6M)

7.a)what is casting yield?how it is calculated and its improvement done? (6M)
b)with neat sketches discuss top,bottom and side gating with its advantages and limitations. (8M)
c)explain the method of design of junction of feeder head and casting. (6M)

8.a)explain the need for mechanization and modernization of foundry. (5M)
b)with sketches discuss briefly 2 methods of dust collecting equipment used in foundry. (5M)
c)list the typical tasks which can be done by computers in foundry application and discuss briefly typical software used with its advantages. (10M)

Earning:   Approval pending.