Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III CAD CAM Previous Question Paper (August/September - 2024 - 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 difference between RAM and ROM.
Answer
RAM (Random Access Memory) is volatile memory used for temporary data storage during active processing, allowing both read and write operations. ROM (Read-Only Memory) is non-volatile memory that stores permanent data or firmware, typically allowing only read operations.
What are the limitations found in the general wire frame modeling systems?
Answer
Wireframe modeling suffers from ambiguity, as it lacks surface information, making it difficult to distinguish between front and back faces. It also fails to provide mass property calculations (like volume or center of gravity) and cannot perform hidden line removal, leading to cluttered and confusing visual representations.
Explain CSG.
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Define blending functions and their significance in surface modeling and design.
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What is role of NC in CAM?
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State the functions of the following G & M codes: (i) G01 (ii) G03 (iii) M03 (iv) M06
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Define CAPP.
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Define part families and their significance in manufacturing.
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Define Coordinate Measuring Machines (CMM).
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Define automated inspection and distinguish between off-line and on-line inspection methods.
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Part B
Discuss interpolation and approximation techniques used in geometric modeling.
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How are these techniques applied to generate curves and surfaces in CAD/CAM systems?
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Compare 2-D and 3-D wire frame model.
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Explain the role of peripherals such as graphics tablets, 3D mice, and large-format printers in CAD workflows.
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Discuss various types of surfaces, including cylindrical, ruled, surface of revolution, spherical, composite, Bezier, B-spline, regenerative, and surfaces with pathological conditions. Provide examples of applications for each type.
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Prove that the curvature of a circular cylinder is zero. What is the radius of curvature at any point on its surface?
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Find the minimum distance between two surfaces.
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Discuss the various interpolation methods used in NC machines.
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Discuss any five motion statements used in APT part programming.
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Explain G74 and G71 as related to boring on CNC lathe machine with suitable example by taking your own dimensions.
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How the tool length compensation and cutter radius compensation is specified in case of a machining center? Explain by giving examples.
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Explain Capacity Requirements Planning (CRP) and its significance in aligning production capacity with demand forecasts.
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How does CRP help optimize resource utilization and minimize production bottlenecks?
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Define Enterprise Resource Planning (ERP) systems and their role in integrating various business functions, including manufacturing, finance, and supply chain management.
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Discuss how ERP systems enhance visibility, collaboration, and decision-making across different departments and business units.
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Discuss the various components of FMS equipment, including CNC machines, robots, conveyor systems, and automated material handling systems.
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Explain the integration of computer control systems in FMS equipment for seamless operation.
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Describe analysis methods used to evaluate the benefits of FMS. What metrics and criteria are typically used to measure the performance and effectiveness of FMS implementations?
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Explain in detail the different types of database requirements in CIM.
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