RAMCO INSTITUTE OF TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING ME6501-COMPUTER AIDED DESIGN IMPORTANT QUESTIONS TIPS: Unit –I first half have theory portions and second half having portions with formulae and problems. So concentrate on problems to get high marks UNIT- II GEOMETRIC MODELING 1. Derive the matrix formulation in cubic Hermite curves
2. Explain about open and closed B spline curves with some characteristics 3. Classify the various types of surface entities with neat sketch and write about coons patch 4. Discuss the matrix formulation in cubic Bezier curves and Rational curves. 5. Compare B-spline surface with Bezier surface. 6. Explain the concept of Constructive Solid Geometry 7. Explain the term B-Rep with Euler equations. 8. Derive the matrix formulation in cubic Bezier curves. 9. Derive the matrix formulation in cubic B-Spline curves ADDITIONAL QUESTIONS 1. Problems on Hermite Curves 2. Problems on Bezier Curves. 3. Study about C0, C1, C2 continuity. TIPS: Second unit first half consist of curves and surfaces. If u study curves means surface is easier. Second half is only CSG and B-Rep. For study solid modelling techniques formulae and diagram is very important.
RAMCO INSTITUTE OF TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING ME6501-COMPUTER AIDED DESIGN IMPORTANT QUESTIONS UNIT- III VISUAL REALISM 1. Describe any four visibility techniques in computer graphics
2. Illustrate the hidden line removal algorithm with neat sketch. 3. Summarise elaborately Ray tracing hidden solid removal algorithm. 4. Discuss how subdivisions are made in area-coherence algorithm 5. List the different colour models and explain any three models 6. Discuss how the computer animation differs from conventional animation 7. Explain Computer animation in detail 8. List the different shading technique and compare them in detail manner. ADDITIONAL QUESTIONS 1. Study all the visibility techniques (totally 10 techniques which was discussed initially in this unit.) 2. If hidden line removal algorithm is asked means explain any one of these- priority, painter, Area-oriented algorithms. 3. If hidden surface removal algorithm is asked means explain any one of these- depth buffer, Area subdivision or Warnock’s, Watkins or even painter algorithm 4. If hidden solid removal algorithm is asked means explain Ray tracing algorithm. 5. In animation topic study all the topics write them depend upon marks provided in the examination 6. Don’t interchange any of the above algorithms.
RAMCO INSTITUTE OF TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING ME6501-COMPUTER AIDED DESIGN IMPORTANT QUESTIONS UNIT IV ASSEMBLY OF PARTS 1. Explain about assembly tree, model, planning and mating conditions. 2. Write briefly about various assembly approaches. 3. Derive the equation for interference of position and orientation. This question may be also asked like this Figure shows a pin and a block with their MCSs. The pin
and the instances to be assembled into the hole in the block. Use WCS and write the transformation matrices to merge the three instances of B into A.
4. Write about tolerance and compare between conventional and geometric tolerances 5. Explain the three methods of tolerance analysis in detail and see some sample problems taught in classroom. 6. Derive the mass property calculations. 7. Write shortly about mechanism simulation and interference checking.
ADDITIONAL TIPS 1. Instead of asking assembly approaches they might be asking application of any part and you have to assembly any one of the assembly approach. Example is universal coupling in IT-II question. 2. Write mass property calculations without mistakes. For example put triple integral with limits on each topic. 3. Study tolerance topic thoroughly.
RAMCO INSTITUTE OF TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING ME6501-COMPUTER AIDED DESIGN IMPORTANT QUESTIONS UNIT V CAD STANDARDS 1. Explain the approaches of GKS in CAD standards
2. Demonstrate the features of OpenGL 3. Illustrate the concept of PHIGS with neat diagram. 4. Explain the importance of computer graphics and computing standards and describe different section in IGES file format. 5. Describe the logical concepts in PDES. 6. Explain the concept of STEP with neat sketch. 7. Compare DXF file format with other data exchange format and explain it with neat sketch. 8. Discuss the importance of CALS in CAD standards. 9. Classify the various modes of communication methods and explain them with neat sketch. ADDITIONAL TIPS 1. The first two topic GKS and OpenGL study using relevant class materials. 2. In IGES study the various entities with their number 3. Study thoroughly about various data exchange standards like CALS, PDES, STEP, DXF and try to understand difference between them. 4. In Communication standards try to follow my notes. NOTE: If you have any queries or doubts, need relevant materials means contact me at 9043489697 or mail me
[email protected] or post in Google Classroom also.