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R07Code No: 07A6EC04 SET-1

B. Tech III Year II Semester Examinations, December/January -2011-12

CAD/CAM(MECHANICAL ENGINEERING, MECHANICAL

ENGINEERING(MECHATRONICS), AUTOMOBILE ENGINEERING)

Time: 3 hours Max. Marks: 80

Answer any five questions

All questions carry equal marks

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1.a) What is raster scanning? Why is it preferred in display devises?b) How do you specify a plotter? Describe various types of storage devises used in

CAD systems. [8+8]

2.a) Explain various graphic transformations required for manipulating the geometricinformation.

b) Explain the importance of clipping. Give the details of method used for line

clipping. [8+8]

3.a) Give the classification of different surfaces that can be used in geometric

modeling applications.b) What are the problems with Bazier curves? How are these taken care of? [8+8]

4.a) Why layers are required in CAD? Explain various display commands used in

CAD applications.b) Explain constraint based solid modeling in CAD. [8+8]

5.a) With a block diagram explain the principle of NC system.b) Explain linear and circular interpolations in CNC system. [8+8]

6.a) What is group technology? State advantages and limitations of GT.b) Define the concept of part family? Explain the one method of classification of

parts in GT. [8+8]

7.a) Explain non-contact inspection method in computer aided quality control.

b) State advantages and limitations of computer aided quality control. [8+8]

8.a) Draw a CIM circle and briefly explain main objectives in it.b) Define AS/AR system. Explain various types of material handling systems in

manufacturing industry. [8+8]

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B. Tech III Year II Semester Examinations, December/January -2011- 12






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1.a) What are the various display devises that are used for displaying graphic

information? Give there merits and demerits.

b) If the resolution of the monitor is 512 horizontal X 320 vertical pixels, and it is

mapped to display of 300 X 200 mm. Show how a line of 80mm length at 45degrees is to be drawn on the screen while starting coordinates of (20, 20) looks in

terms of pixels. [8+8]

2.a) Explain the concept of various coordinate systems required for geometric display

systems. Give an example.

b) Explain the concept of obtaining a reflection about an arbitrary line starting froma plane reflection about an axis. [8+8]

3.a) Give a classification of the different surfaces that can be used in geometric

modeling applications.b) Give a brief description about the spline curves. [8+8]

4.a) What are the basic geometric entities available for creating solid models indrafting system?

b) Differentiate between wire frame, surface and solid models drafting. [8+8]

5.a) Differentiate between machining center and turning center in CNC machines.

b) What is manual CNC part program explain with example?

6.a) Explain with a block diagram Opitz coding system used in group technology.

b) What are the limitations of group technology in manufacturing industry? [8+8]

7.a) What are the objectives of computer aided quality control?b) Explain the method of part inspection using CMM in computer aided quality

control. [8+8]

8.a) Explain various factors to be considered for implementing CIM.

b) Why material handling is required in manufacturing system? Explain one modern

material handling system? [8+8]

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1.a) Explain screen buffer and scanning related to CAD systems.

b) If a frame buffer is limited to 256k bytes of RAM, what is the reasonable

resolution given the aspect ratio 1? The display is having an 8 bit color planes and

the screen size having an aspect ratio of 4:3. [8+8]

2.a) Explain the concept of various coordinate systems required for geometric display

systems. Give an example.b) Explain the concept of obtaining a rotation about an arbitrary point in XY plane.

[8+8]

3.a) Give the classification of geometric modeling systems based on their capabilities.

b) Explain coons and Bezier surfaces. What are the differences and applications for

which these are used? [8+8]

4.a) What are the facilities that are useful for editing geometric entities in a drafting

system?

b) Explain extrude and sweep commands in CAD software package. [8+8]

5.a) With a block diagram explain main features of CNC machine tools.

b) Differentiate between manual part programming and computer aided partprogramming in CNC machines. [8+8]

6.a) Define group technology concept. Explain one method of parts coding system.b) Explain the guidelines and requirements for implementing group technology.

[8+8]

7.a) Define computer aided quality control. Explain how it is implemented.

b) Explain the construction of CMM used in computer aided quality control. [8+8]

8.a) State and explain the advantages of CIM in manufacturing industry.b) With a CIM circle diagram explain communication network the system. [8+8]

--ooOoo--

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ENGINEERING (MECHATRONICS), AUTOMOBILE ENGINEERING)




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1.a) What are the various input devices that are used for graphic information input?Give their merits and limitations.

b) A computer display system has resolution of 800 Horizontal X 600 vertical pixels.

If the screen aspect ratio is 4:3, show how a square box of 400 pixels can be

drawn. [8+8]

2.a) Explain the principle of DDA and Bresenhams algorithms for the linear

interpolation for graphics terminal.b) Discuss why the homogeneous coordinate system is generally used in graphics in

place of a normal system. State advantages with an example. [8+8]

3.a) Discuss the concept of the three Boolean operations used in solid modeling.

Explain with neat sketches.

b) What are the advantages of using a B rep scheme? [8+8]

4.a) What are the types of dimensioning systems are available in CAD drafting

system?

b) Why layer command is useful in computer drafting environment? [8+8]

5.a) What are the main features of CNC Machine tool? Explain ATC in CNC

machines.b) Write a manual CNC part program for a simple job and explain various

parameters in the program. [8+8]

6.a) Define and Explain the philosophy of group technology in manufacturing.

b) What is part family? State advantages and limitations of group technology.[8+8]

7.a) Discuss major non contact inspection systems in computer quality control.b) Explain the method of part inspection in computer aided quality control using

conventional CMM. [8+8]

8.a) Explain the concept of CIM implementation in manufacturing unit. Draw CIM

circle.

b) State benefits and limitations of CIM. [8+8]

--ooOoo--

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