Reg. No. :

Question Paper Cod e z 68044

M.E. DEGREE EXAMINATION, JA}TUARY 2013.

First Semester

CD 92L71218101/CD 911ruCD ILLIIIOLL? CD TO2- COMPUTER APPLICATIONSIN DESIGN

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

(Regulation 2009/20 10)

Maximum: 100 marksTime : Three hours

Answer ALL questions.

A-(10 x2=2A marks)1. Define Co and Cl continuity.

.,s'

2 Whatr is composite transformation matrix? Write a composite matrix forsuccessive translation

4- List the surface entities provided by CAD software.5. What are the basic elements used in half space representation model?

7. Write the transformation matrix of YIQ model.It 8. What is silhouette polygon?

/ 9. What is meant by tolerance accumulation?i 10. Classify the dnimation system from a control point of view.

g \ L L I L ( o I c I I

11. (a)PARTB-(5x 16=80marks)

with a block diagram. explainlthe concept of two dimensio-nal viewingtransformation from world co-ordinate. i (16j

Or(b) (, Discuss the working 'of Nichol-Lee-Nichol-,line elipping algorith-

with suitable examples for all cases.(ii) Write about surface clipping algorithm.

12. (a) Explain a method to interface a programmingdrafting package in detail.

Or

language with

(10)(6)

d typical

I(b)13. (a)

(, Tlpes of.polyhedral objects in B-rep(ii) Sweeprepresgntation.

Or(b) Explain the analytical oolidsodeling peqe-dgre. i

14- (a) (i) Explain the area briented hidden rine removal algorithm.(ii) Explain the Minirnax test.

oExplain the following test used in visibility technique.

(ii) Containment test(iii) Surface test(rv) Homogeneity test.Explain different types of form tolerances.

OrExplain the following in detail(, Caiculation of Cross-sectional Area(ii) 'Location graph(iii) SkeltonAlgorithm.

Explain the step by step procedure to create a BD spur gear using a solidmodeling package.

Explain following:-'- (8)

(8)

(16)

(6)(10)

(b) (4x4=16)

(16)

(6)(5)(5)

15. (a)

(b)

68044

Reg. No. :

Question Paper Cod e z 68044

M.E. DEGREE EXAMINATION, JA}TUARY 2013.

First Semester

CD 92L71218101/CD 911ruCD ILLIIIOLL? CD TO2- COMPUTER APPLICATIONSIN DESIGN

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

(Regulation 2009/20 10)

Maximum: 100 marksTime : Three hours

Answer ALL questions.

A-(10 x2=2A marks)1. Define Co and Cl continuity.

.,s'

2 Whatr is composite transformation matrix? Write a composite matrix forsuccessive translation

4- List the surface entities provided by CAD software.5. What are the basic elements used in half space representation model?

7. Write the transformation matrix of YIQ model.It 8. What is silhouette polygon?

/ 9. What is meant by tolerance accumulation?i 10. Classify the dnimation system from a control point of view.

g \ L L I L ( o I c I I

11. (a)PARTB-(5x 16=80marks)

with a block diagram. explainlthe concept of two dimensio-nal viewingtransformation from world co-ordinate. i (16j

Or(b) (, Discuss the working 'of Nichol-Lee-Nichol-,line elipping algorith-

with suitable examples for all cases.(ii) Write about surface clipping algorithm.

12. (a) Explain a method to interface a programmingdrafting package in detail.

Or

language with

(10)(6)

d typical

I(b)13. (a)

(, Tlpes of.polyhedral objects in B-rep(ii) Sweeprepresgntation.

Or(b) Explain the analytical oolidsodeling peqe-dgre. i

14- (a) (i) Explain the area briented hidden rine removal algorithm.(ii) Explain the Minirnax test.

oExplain the following test used in visibility technique.

(ii) Containment test(iii) Surface test(rv) Homogeneity test.Explain different types of form tolerances.

OrExplain the following in detail(, Caiculation of Cross-sectional Area(ii) 'Location graph(iii) SkeltonAlgorithm.

Explain the step by step procedure to create a BD spur gear using a solidmodeling package.

Explain following:-'- (8)

(8)

(16)

(6)(10)

(b) (4x4=16)

(16)

(6)(5)(5)

15. (a)

(b)

68044

Reg. No. :

M.E. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010

First Semester

Computer Aided Design

CD 9211 COMPUTER APPLICATIONS IN DESIGN

(Common to M.E. CAD/CAM/M.E. Engineering Design and

M.E. Product Design and Development)

(Regulation 2009)

Time : Three hours Maximum : 100 Marks

Answer ALL questions

PART A (10 2 = 20 Marks)

1. For the position vectors ]3,2[1P and ]5,4[2P determine the parametric

representation of the line segment between them.

2. What is Bernstein basis function? How does it alter the shape of a curve?

3. Explain the parametric surface with two variables and mention its advantages.

4. For a given radius and centre point write Auto LISP command to draw circle.

5. Write down the Euler-Poincare formula to verify the topology of valid solid

models.

6. What are the neutral file translators?

7. What is visual realism? List the techniques used for visual realism.

8. Name the different types of light sources.

9. What are the various types of geometric tolerances?

10. What are the various animation techniques developed to simulate the

mechanism?

Question Paper Code : 97660

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PART B (5 16 = 80 Marks)

11. (a) What is clipping? Explain Liang-Barsky line clipping algorithm in detail

with examples. (16)

Or

(b) Explain the various types of surfaces used in a CAD model (16)

12. (a) (i) Explain a method to interface a programming language with a

typical drafting package in detail. (8)

(ii) Explain the principle of parametric modification of geometric

models. (8)

Or

(b) (i) List and explain standard tool bars available in any solid modeling

packages. (8)

(ii) Write an Auto LISP program to design and draft a solid disk type

flywheel for the given specifications.

Flexural energy : 40 Nm

Mean speed : 240 rpm

Permissible fluctuation of speed : 2%. (8)

13. (a) Write the Boolean set operations for CSG and Boundary representation

for the solid given below. (16)

Or

(b) (i) Explain IGES file structure with examples. (8)

(ii) Explain the concept of product data exchange using STEP in detail.

(8)

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97660 3

14. (a) Write short notes on the following Hidden line removal algorithms.

(i) A buffer method. (4)

(ii) BSP Tree. (4)

(iii) Octree. (4)

(iv) Ray Casting method. (4)

Or

(b) (i) Describe the various shading algorithms in detail. (8)

(ii) Explain HSV and HLS coloring models (8)

15. (a) (i) Explain the worst case arithmetic method for tolerance analysis. (8)

(ii) Discuss how the surface area is calculated using CAD software. (8)

Or

(b) (i) Describe the various ANSI from tolerances with neat diagram. (8)

(ii) What are the mating conditions for assembly? Discuss. (8)

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Reg. No. :

M.E. DEGREE EXAMINATION, JANUARY 2010

First Semester

CAD/CAM

CD 9211 COMPUTER APPLICATIONS IN DESIGN

(Common to M.E. Engineering Design, M.E. Product Design and Development and

M.E. Computer Aided Design)

(Regulation 2009)

Time: Three hours Maximum: 100 Marks

Answer ALL Questions

PART A (10 2 = 20 Marks)

1. Illustrate the Scan-conversion process of a straight line in terms of pixel

position.

2. Write the mathematical expression to scale a straight line about a fixed point.

3. Write the parametric equation of a plane surface defined by three points 10 ,PP

and 2P .

4. Illustrate the difference between geometry and topology.

5. Sketch the four Boolean operations of a block and a cylinder B.

6. Illustrate translational and rotational sweep models.

7. Distinguish between hidden line removal and hidden surface removal models.

8. State the salient features of RGB color space.

9. Briefly explain the top-down assembly approach.

10. What is the importance of WCS method in the assembly model?

Question Paper Code: W7622

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PART B (5 16 = 80 Marks)

11. (a) Derive decision parameters for the Bresenhams circle generating

algorithm assuming the starting point as (0, 10) and generate the pixel

positions for one forth of a circle.

Or

(b) Explain the Cohen - Sutherland line-clipping approach with proper

sketches.

12. (a) A shaft is to transmit 10 kW power at 1500 rpm. The shaft is made of

medium carbon steel material. Write a C program to select the material,

design the shaft and create the CAD model.

Or

(b) A flange coupling is to transmit 5 kW power at 1500 rpm. The coupling is

made of cast iron. Write a C/LISP/FORTRAN program to design the

coupling and draw the production drawing of the coupling.

13. (a) Explain the following polyhedral object using B-rep elements and verify

the Euler equation for the same

(i) Simple Polyhedra.

(ii) Polyhedral object a face may have loops.

(iii) Objects with holes that do not go through the entire object.

(iv) Objects have holes that go through entire objects.

Or

(b) Sketch the following feature operations using CSG.

(i) Extruded

(ii) Revolved feature

(iii) Chamber

(iv) Loft feature

(v) Pocket

(vi) Shell

(vii) Fillet

(viii) Draft

(ix) Rib and

(x) Dimple.

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14. (a) Explain briefly with sketches any six tests used for hidden line

identification.

Or

(b) (i) List the differences and the similarities between nonlinear sweeps

and lofts.

(ii) Describe how the variable radius fillet works. When is such one

used?

15. (a) Fig. 15 (a) 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.

Part A Part B

Fig. 15 (a)

Or

(b) Use the bottom-up approach to create the model of the universal joint

shown in Fig. 15 (b)

Fig. 15 (b)

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Reg. No. :

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)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

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

Question Paper Code: J7629

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J7629 2

(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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