Code No: R41032
R10
Set No. 1
IV B.Tech I Semester Regular Examinations, December - 2013
CAD / CAM
(Common to Mechanical Engineering and Automobile Engineering)
Time : 3 hours
Max. Marks: 75
Answer any Five Questions
All Questions carry equal marks
**
1 a) Briefly explain the typical hardware components of a stand alone CAD system.
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b) Describe briefly the two basic techniques used in image generation in computer
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graphics.
2 a) Define Geometric model. Explain how a 3-D object is represented by a wire
frame model.
b) Distinguish between 2-D and 3-D wire frame models.
3
Specify the three principal classifications of the geometric modeling systems
and write in brief about each of them.
4 a) Explain the model structure used in data base organization.
b) Distinguish between C-rep and B-rep models.
5 a) Draw the block diagram of CNC and explain briefly about structure.
b) Briefly discuss the procedure for preparing an NC Part Programming.
6 a) Explain Opitz classification system.
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b) Discuss the basic code structures used in group technology.
7 a) Explain the following: CMM
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b) Machine Vision
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8 a) What is computer integrated manufacturing? Explain.
b) Explain briefly the scope of Computer Integrated Manufacturing.
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R10
Code No: R41032
Set No. 2
IV B.Tech I Semester Regular Examinations, December - 2013
CAD / CAM
(Common to Mechanical Engineering and Automobile Engineering)
Time : 3 hours
Max. Marks: 75
Answer any Five Questions
All Questions carry equal marks
**
1 a) What are the basic reasons for introducing CAD?
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2
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b) What is engineering analysis? Explain it with the example a gear and shaft
assembly.
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What is meant by a geometric entity? Explain the common entities used in
geometric modeling.
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Describe with the help of neat sketches the major surface entities provided by
CAD/CAM systems.
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What is the need for concatenation of transformations? Explain what care
should be taken in such cases.
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5 a) Discuss the difficulties encountered in using conventional numerical control.
b) Enumerate the advantages of Computer Aided Part Programming when
compared to Manual Part Programming.
6
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The following table lists the weekly quantities and routings of ten parts that
are being considered for cellular manufacturing in a machine shop. Parts are
identified by letters and machines are identified numerically. For the data
given,
(a) develop the part machine incidence matrix, and
(b) apply the rank order clustering technique to the part-machine
incidence matrix to identify logical part families and machine groups.
Part
Weekly Quantity
A
B
C
D
50
20
75
10
E
12
Machine routing
3
2
7
6
6
1
5
6
3
5
2
1
7
4
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Code No: R41032
R10
Set No. 2
7 a) Differentiate between Computer-aided inspection (CAI) and Computer-aided
testing (CAT).
b) Briefly explain the contact inspection methods.
8
Describe hardware configuration of CIM with the help of a sketch.
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Code No: R41032
R10
Set No. 3
IV B.Tech I Semester Regular Examinations, December - 2013
CAD / CAM
(Common to Mechanical Engineering and Automobile Engineering)
Time : 3 hours
Max. Marks: 75
Answer any Five Questions
All Questions carry equal marks
**
1 a) Write short notes on Random scan graphic terminal
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b) Write short notes on Digitizers and Image scanners
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2
Explain how 2-D and 3-D transformation are done on a graphics element
3
Discuss the modeling guidelines to be followed by the user while constructing
a surface model as a CAD/CAM system.
4 a) Describe various commonly used primitives for solid modeling and explain
the Boolean operations.
b) Describe the properties that a solid model should capture mathematically.
5 a) Distinguish between NC tooling and conventional tooling.
b) Describe the advantages of NC manufacturing.
6 a) Discuss the benefits of Group technology.
b) What is group technology? Classify a component using any one type of coding
system.
7 a) Write short notes on the following computer-aided quality control systems.
Computer- aided testing.
b) Laser beam scanners.
8
Explain with the aid of a block diagram the “concept of CIM”.
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Code No: R41032
R10
Set No. 4
IV B.Tech I Semester Regular Examinations, December - 2013
CAD / CAM
(Common to Mechanical Engineering and Automobile Engineering)
Time : 3 hours
Max. Marks: 75
Answer any Five Questions
All Questions carry equal marks
**
1
Write a note on the output devices used in CAD system
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2
3
4
A scaling factor of 2 is applied in the Y direction while no scaling is applied in
the X direction to the line whose two end points are at coordinates (1, 3) and
(3, 6). The line is to be rotated subsequently through 300, in the counter
clockwise direction. Determine the necessary transformation matrix for the
operation and the new coordinates of the end points.
[15]
Describe with the help of neat sketches the major surface entities provided by
CAD/CAM
systems.
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What do you mean by geometric modeling? Enumerate various solidmodeling techniques and compare them.
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5 a) What is a preparatory function? Name any four such functions.
b) What is a miscellaneous function? Explain its importance. Give any four
examples.
6 a) What are part families? What are the methods used for grouping of parts?
b) Explain the part design and manufacturing attributes giving examples.
7 a) Explain the application and advantages of integration of CAQC with
CAD/CAM systems.
b) With the help of schematic diagram explain the operation of scanning laser
beam system. Explain its application in CAQC systems.
8 a) Explain the applications of Computer Integrated Manufacturing systems.
b) Discuss the possible computer applications in Manufacturing Planning
activities.
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