Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III CAD/CAM Previous Question Paper (July - 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
What is interpolation and approximation of curves?
Answer
Interpolation is the process of generating a curve that passes exactly through all specified data points. Approximation is the process of generating a curve that passes near the specified data points, typically minimizing the distance between the curve and the points to create a smooth shape.
What are the different types of wire frame entities?
Answer
Wireframe entities are geometric primitives used to represent the edges of an object. The main types include:
- Points: Zero-dimensional entities defined by coordinates.
- Lines/Segments: Linear entities defined by two endpoints.
- Arcs/Circles: Defined by a center point, radius, and angular range.
- Curves: Complex entities like splines or conics defined by control points or mathematical equations.
What are the applications of surface modeling?
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What is cell composition and spatial occupancy enumeration?
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What is M-code? Explain any two M- codes with examples.
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Explain the concept of a post-processor in NC systems.
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Explain about CAPP.
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What is the difference between MRP and ERP?
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What are Coordinate Measuring Machines (CMMs) and their role in quality control?
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Discuss the concept of machine vision and its applications in quality control.
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Part B
Explain the difference between parametric and non-parametric representation of curves with suitable example.
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Explain the characteristics of B-spline cure.
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What are the different types of curve fitting techniques? Explain any one of them.
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What is blending of curves? What is the need of blending?
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State and explain different types of features used in CSG.
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Explain the concept of composite surfaces in geometric modeling. Discuss the advantages of using composite surfaces.
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What are the limitations of boundary representations in representing complex solids?
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Discuss the role of solid modeling in Computer-Aided Manufacturing (CAM) and CNC machining processes.
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Explain the concept of automatic tool selection and tool path generation in computer-aided part programming. Discuss the benefits of automation in tool selection.
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What is feedback signal? Explain its importance in adaptive controlling system.
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Explain the different elements of an NC system and their roles in the overall functioning of the system.
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Compare and contrast retrieval type and generative type computer-aided process planning methods.
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Discuss the role of parts classification and coding in Group Technology and its impact on production efficiency.
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Explain the difficulties faced in traditional process planning and how computer-aided process planning addresses these challenges.
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Discuss the key factors to consider in machine cell design and its role in implementing Group Technology.
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Explain the difference between contact and non-contact inspection techniques in quality control, and provide examples of each.
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Discuss the advantages of integrating CAD and CAM systems in CIM. Explain how the seamless exchange of data between CAD and CAM systems enhances efficiency and accuracy.
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