Download GTU BE/B.Tech 2018 Winter 6th Sem New 2162106 Foundry Technology Question Paper

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Subject Name: Foundry Technology

Time: 02:30 PM TO 05:00 PM

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

GUJARAT TECHNOLOGICAL UNIVERSITY

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1. (a) Differentiate the terms “Pattern” and “casting”. MARKS 03
   (b) Illustrate the criteria to be selected before manufacturing of pattern for castings 04
   

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   (c) Explain the advantages, limitations, and applications of foundry practice 07
2. (a) Describe the basic steps of foundry with help of Flow chart. 03
   (b) Identify the pattern which is use for manufacturing big casting by one moulder and describe it with schematic sketch 04
   (c) Explain the salient feature of cupola furnace with schematic sketch 07
   OR
   

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   (c) What do you mean by pattern allowances? Why its necessary to be provided during Manufacturing? Explain in brief about shrinkage allowance. 07
3. (a) Enlist the basic requirements of core. 03
   (b) Explain how green strength and permeability are affected by Grain shape of the sand. 04
   (c) What do you mean by investment casting? Explain the investment casting process with advantages limitation and application. 07
   OR
   

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   (c) which pattern is used for manufacturing of master pattern? Explain in brief 07
4. (a) why machining allowance is provided to the pattern? 03
   (b) Write note on sodium silicate Co process 04
   (c) list out the patterns that can be used for mass production and also describe the salient feature of any one. 07
5. (a) Write applications of shell moulding process 03
   

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   (b) List various casting defects and suggest the remedies for it. 04
   OR
   (c) Draw the schematic figure of core box which is used for manufacturing L shape Pipe bends 07
6. (a) What is importance of binder in sand casting process? List various binders. 03
   (b) Differentiate the semi centrifugal and true centrifugal casting. 04
   

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   (c) Could low c steel be melted in cupola?-Justify 07
7. (a) Compare and contrast sweep pattern and segmental pattern. 03
   (b) What do you mean by investment casting? Explain the investment casting process with advantages limitation and application. 04
   OR
   (b) State the function of Runner, Riser and gating system in casting process 04
   

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   (c) Explain gravity die casting technique in detail. 07