Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech II PRODUCTION TECHNOLOGY Previous Question Paper (February - 2024 - R13)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is meant by draft allowance?
Answer
Draft allowance is the intentional taper provided on the vertical surfaces of a pattern to facilitate its easy removal from the sand mold without damaging the mold cavity walls.
Write different types of patterns.
Answer
Common types of patterns include:
- Single-piece pattern
- Split-piece pattern
- Match-plate pattern
- Cope and drag pattern
- Sweep pattern
- Skeleton pattern
- Loose-piece pattern
Why weld should be penned with a hammer?
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What are the safety precautions observed in welding?
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What is soldering process?
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Why do most welding failures occur in HAZ?
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What is strain hardening?
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What is angle bite? What is value of bite angle for various materials in rolling operations?
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Define extrusion.
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What are defects in forged parts?
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Part B
What is the purpose of sand conditioning equipment? Name several machines of this purpose indicating the specific purpose of each.
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Give the steps in the sand-casting process and explain each briefly.
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List several ways to clean casting surfaces, and write the advantages and dis-advantages of each.
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Describe the centrifugal casting process and what workpiece configuration best suits it.
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Explain the inert-gas metal arc welding. How does it differ from metal arc welding?
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What are the advantages and disadvantages of D.C and A.C welding?
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Draw a diagram showing the classification of the welding process.
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Write the difference between Arc welding and forge welding.
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Explain explosive welding with a neat diagram.
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Explain the mechanism of metal transfer in MIG/MAG welding.
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Explain destructive and non-destructive testing of welds.
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Write the difference between friction welding and induction welding.
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Explain the principle of stretch forming. What are its advantages and limitations?
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Describe the process of metal spinning and the tools used for spinning.
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What are the main characteristics of hot working compared to cold working processes?
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What are the different types of drawing? Explain each with the help of a neat sketch.
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Explain forging operations and its principles.
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Explain briefly the terms of backing and lapping as related to forging practice.
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Write the difference between forward extrusion and backward extrusion.
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Explain the forces in extrusion.
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