Download GTU BE/B.Tech 2019 Winter 5th Sem New 2152506 Foundry Technology Question Paper

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Subject Code: 2152506

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER- V (New) EXAMINATION - WINTER 2019

Subject Name: Foundry Technology

Time: 10:30 AM TO 01:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. (a) What is the benefit of split pattern over a one piece or solid pattern? [03]
2. (b) Differentiate open and blind risers. [04]

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3. (c) Explain the metallurgical advantages of castings in comparison to welding process [07]

Q.2

1. (a) Why the following allowances are provided on the patterns in sand moulding?
   1. Draft
   2. Contraction
   3. Shaking

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   [03]
2. (b) Explain any two pattern materials. [04]
3. (c) Enlist types of pattern. Explain any Three of them with neat sketch. [07]

OR

1. (a) Write how pattern is different than casting? Explain pattern color coding system. [07]

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Q.3

1. (a) Sketch the cross section of a sand mould which is ready for pouring and label the various important parts. [03]
2. (b) Give comparison between Shell Moulding and Precision Investment Casting. [04]
3. (c) Explain “Centrifugal Casting” methods with neat sketch along with it’s advantages over conventional green sand moulding. [07]

OR

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1. (a) Differentiate between blow holes and pin hole porosity. [03]
2. (b) Explain High Frequency Induction Furnaces. [04]
3. (c) Describe casting defects stating their causes and remedies. [07]

Q.4

1. (a) Define and explain the function of riser in casting. [03]

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2. (b) Explain the various stages of heat treatment. [04]
3. (c) Explain the various Fettling process carried out after casting process. [07]

OR

1. (a) Explain Directional solidification with neat sketch. [03]
2. (b) List out various types of heat treatment and explain any one in detail. [04]

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3. (c) Write casting quality inspection techniques. Explain any one NDT in detail [07]

Q.5

1. (a) List out desirable properties of moulding sands. [03]
2. (b) Differentiate between bottom gating system and part gating system in detail. [04]
3. (c) What is the role of mechanization in improving the productivity of foundries? [07]

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OR

1. (a) List the common constituents of foundry sand mix. [03]
2. (b) Explain the types of Gates with neat sketch. [04]
3. (c) Explain the role of Computer in Casting Industries. [07]

Date: 25/11/2019

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Total Marks: 70