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**M.E. DEGREE EXAMINATION, JUNE 2010**

**First Semester**

**Computer Aided Design**

**CD9211 — COMPUTER APPLICATIONS IN DESIGN**

**(Common to M.E. CAD/CAM/M.E. Engineering Design and M.E. Product Design and Development)**

**(Regulation 2009)**

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**ANNA UNIVERSITY SYLLABUS - Click Here**

**PART A — (10 × 2 = 20 Marks)**

1. What happens to the pictures that are too large to fit on the screen?

2. What is Bezier and B-spline curves?

3. List down the limitations of CAD software.

4. What is the general structure of program to solve design problems?

5. What do you know about boundary representation scheme?

6. List down the importance of communication standards in solid modeling.

7. Mention the prismatic part creation features.

8. What is the principle behind visualization of parts?

9. What is important in mechanism simulation?

10. Why is tolerance analysis important in parts assembly?

**PART B — (5 × 16 = 80 Marks)**

11. (a) (i) What is meant by homogeneous co-ordinate system for transformations? What are its advantages? Explain. (8)

(ii) What is meant by composite transformations? How does it achieved? Discuss. (8)

Or

(b) Explain the following :

(i) World, screen and normalized coordinates. (8)

(ii) 2D graphics primitives. (8)

12. (a) What are the steps in interactive programs to solve design problems? Describe each step briefly. (16)

Or

(b) What are the issues involved in design of a story board layout with accompanying key frames for an animation of a single polyhedron? Discuss in detail. (16)

13. (a) (i) Make a note on sweep representations in solid modeling. (8)

(ii) Discuss the term Constructive Solid Geometry. (8)

Or

(b) (i) Explain the consolidated features of data exchange standards. (8)

(ii) Discuss the Boolean intersection operations with a block and a cylinder. (8)

14. (a) (i) Explain the depth-buffer (z-buffer) algorithm for hidden surface removal. (8)

(ii) Explain the procedure to compute the z-values in two successive locations in a scan-line and intersection positions on two successive scan lines. (8)

Or

(b) Write an algorithm for generating a quad tree representation for the visible surfaces of an object by applying the area subdivision tests to determine the values of the quad tree elements. (16)

15. (a) (i) Discuss the hidden features of assembly modeling technique. (8)

(ii) Explain the highlights of mass property calculations relevant to parts assembly. (8)

Or

(b) Discuss the sequential steps in mechanism simulation and its important features. (16)

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