GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-VI(NEW) — EXAMINATION — SUMMER 2019
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Subject Code: 2162106 Date: 14/05/2019
Subject Name: Foundry Technology
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1
- (a) Differentiate the terms “Pattern” and “casting”. [03 Marks]
- (b) Illustrate the criteria to be selected before manufacturing of pattern for castings [04 Marks]
- (c) Explain the advantages, limitations, and applications of foundry practice [07 Marks]
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Q.2
- (a) Describe the basic steps of foundry with help of Flow chart. [03 Marks]
- (b) Identify the pattern which is use for manufacturing big casting by one moulder and describe it with schematic sketch [04 Marks]
- (c) Explain the salient feature of cupola furnace with schematic sketch [07 Marks]
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 Marks]
Q.3
- (a) Enlist the basic requirements of core. [03 Marks]
- (b) Explain how green strength and permeability are affected by Grain shape of the sand. [04 Marks]
- (c) What do you mean by investment casting? Explain the investment casting process with advantages limitation and application. [07 Marks]
OR
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Q.3
- (a) which pattern is used for manufacturing of master pattern? Explain in brief [03 Marks]
- (b) why machining allowance is provided to the pattern? [04 Marks]
- (c) Write note on sodium silicate Coprocess [07 Marks]
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Q.4
- (a) list out the patterns that cam be used for mass production and also describe the salient feature of any one. [03 Marks]
- (b) Write applications of shell moulding process [04 Marks]
- (c) List various casting defects and suggest the remedies for it. [07 Marks]
OR
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Q.4
- (a) Draw the schematic figure of core box which is used for manufacturing L shape Pipe bends [03 Marks]
- (b) What is importance of binder in sand casting process? List various binders. [04 Marks]
- (c) Differentiate the semi centrifugal and true centrifugal casting. [07 Marks]
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Q.5
- (a) Could low c steel be melted in cupola?-Justify [03 Marks]
- (b) Compare and contrast sweep pattern and segmental pattern. [04 Marks]
- (c) What do you mean by investment casting? Explain the investment casting process with advantages limitation and application. [07 Marks]
OR
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Q.5
- (a) What are chaplets? Draw different types chaplets [03 Marks]
- (b) State the function of Runner, Riser and gating system in casting process [04 Marks]
- (c) Explain gravity die casting technique in detail. [07 Marks]
Total Marks: 70
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