JNTU
JNTU B.Tech III CAD CAM Previous Question Paper (February - 2023 - R16)
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
Explain the benefits of CAD in an industry.
Answer
The primary benefits of CAD in an industry include increased productivity through faster design iterations, improved product quality due to precise modeling and simulation, and reduced design costs by minimizing physical prototyping. Furthermore, CAD facilitates better documentation, easier modification of designs, and seamless integration with manufacturing processes (CAM) for enhanced data consistency.
Differentiate job production, batch production and mass production.
Answer
The differences between the three production systems are based on volume, variety, and process flexibility:
- Job Production: Involves the manufacturing of a single or very small number of units designed to customer specifications. It requires highly skilled labor and general-purpose machines, resulting in high flexibility but low production volume and high unit costs.
- Batch Production: Involves producing a limited quantity of identical products in groups or batches. It balances flexibility and efficiency, utilizing specialized tooling and semi-skilled labor to produce moderate volumes, allowing for periodic changes in production setup.
- Mass Production: Involves the continuous production of large volumes of standardized products using dedicated, automated equipment and assembly lines. It offers the lowest unit cost and highest efficiency but provides minimal product variety and requires high initial capital investment.
Define the term surface patching.
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List out different types of solid modelling representation schemes.
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What are the applications of Numerical control system?
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Differentiate absolute positioning and incremental positioning.
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Discuss importance of Enterprise Resource Planning.
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What is the need of part analysis?
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What is the role of computers in quality control functions?
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State the objectives of CIM system.
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Part B
Explain the role of CAD/CAM in the design process with a neat sketch.
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List out the benefits and applications of CAD in an industry.
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Compare 2-D and 3-D wireframe models.
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Explain the concepts of parametric representation of curves.
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Define blending function. Explain the significance of blending function in surface modelling.
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Write about Bezier surface modeling with a neat sketch.
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Explain the procedure for constructing a solid modeling.
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Define the term boundary representation and explain the different entities in B-rep with a neat sketch.
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Differentiate Manual part programming and Computer assisted part programming.
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List out and explain about basic components of a CNC system with a neat sketch.
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Explain different types of numerical control system.
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Differentiate between CNC and DNC machines.
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Explain about Production Flow Analysis (PFA) with a neat sketch.
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List the out functions and benefits of Group Technology.
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Write a short note on Machinability data systems.
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Define capacity requirement planning and its implementation in a current manufacturing industry.
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Define FMS and explain different types of layout configurations with a neat sketch.
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Explain the differences between offline and online automated inspection.
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Define CMM? Explain different types of CMM with neat sketches.
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Write the advantages and disadvantages of CIM in manufacturing industry.
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