JNTU
JNTU B.Tech III CAD CAM Previous Question Paper (May - 2019 - R16)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
PART - A
What is meant by automation?
Answer
Automation is the technology by which a process or procedure is accomplished with minimal human assistance. It involves the use of control systems, such as computers or robots, and information technologies to handle different processes and machinery in an industry.
Explain the working of digitizers, joystick and paddle wheel.
Answer
These are input devices used for graphical interaction:
- Digitizers: Devices that convert graphical data from a physical drawing into digital coordinates by tracing over the image with a stylus or puck.
- Joystick: A lever that pivots on a base and reports its angle or direction to the system, typically used for cursor movement or controlling object orientation.
- Paddle Wheel: A rotary input device (dial) that translates rotational movement into digital signals, often used for precise control of a single parameter like screen brightness or object rotation.
What is the parametric form of plane surface?
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Differentiate between linear sweep and rotational sweep.
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What do you understand by M and G functions?
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What is the importance of Adaptive control systems in CAD?
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State the advantages of CAPP.
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Discuss the benefits of GT.
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Distinguish between FMS and FMC.
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State the objectives of quality control.
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PART - B
What are the fundamentals of CAD/CAM? Explain.
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List out the different entities of wire frame modeling? Briefly explain them.
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Explain zero order, first order, second order continuity of curves?
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With neat sketch explain the Cubic curve, Bezier and B spline curves? Which of them more popular in CAD?
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Derive the parametric form of following:
Bezier surface
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B-Spline surface
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Coon’s surface.
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With suitable example briefly explain about the C-rep modeling and B-rep modeling.
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With neat sketch, explain the spatial occupancy enumeration and Octree Encoding.
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What are the different types of NC modes? Explain them schematically.
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Describe the APT languages.
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What are the requirements of structure in the case of CNC machine tools?
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Explain the concept of adaptive control of NC machines.
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What is production flow analysis? Discuss various steps involved in PFA
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What are the main advantages of poly code over mono code?
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What is MRP? Explain the various aspects of MRP.
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Discuss a generative process planning system.
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What are the components of an FMS? Explain their characteristics.
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What are the benefits of FMS?
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With neat diagram, explain about CMM.
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What are the advantages of CIM?
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