Summer 2016 Computer Aided Design Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER –IV • EXAMINATION – SUMMER 2016
Subject Code: 3341904 Date: 20- 05-2016
Subject Name: COMPUTER AIDED DESIGN (CAD)
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Each question carry equal marks (14 marks)

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Q.1 Answer any seven out of ten.  14

1. Write full form of USB, DVD, EPROM, and CAE.

2. Define CAD and CAM.

3. Write name of any four Input devices used for CAD workstation.

4. Write any four Output devices used for CAD workstation.

5. Write the name of any four printers.

6. Explain AutoCAD “UNION” command with suitable example.
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7. Write any two differences between 2-D drawing and 3-D drawing.

8. Explain AutoCAD “3D ARRAY” command with suitable example.

9. Explain AutoCAD “BOX” command with suitable example.

10. Write name of any four parametric modeling software.

Q.2 (a) Explain any six computer graphics terminology in brief. 03

OR

(a) Write any six main applications of CAD system. 03

(b) Explain design steps in CAD process with suitable diagram. 03

OR

(b) Draw the block diagram of CAD work station. 03


(c) Write types of 2D- geometrical transformation and explain any one in brief. 04

OR

(c) Define geometrical transformation. A line having end coordinates (3,3) and (4,6) is rotate by 30 degree with respect to origin. Find out coordinates of final position of the line. Draw the necessary sketch of line. 04

(d) Write types of coordinate system. Explain any one in brief. 04

OR

(d) Explain CSG (Constructive Solid Geometry) modeling method with suitable example. 04

Q.3 (a) Write the six main specifications of CAD workstation in your CAD laboratory. 03

OR

(a) Write differences between wire frame modeling, surface modeling and solid modeling( any three points) 03

(b) Define parametric modeling and write any two benefits of parametric modeling. 03

OR

(b) Write any three differences between parametric modeling and non parametric modeling with CAD software. 03

(c) State and explain any four options of UCS command in AutoCAD with figure 04

OR

(c) Write the steps to prepare AutoCAD 3D model drawing of the given figure 1. Specify the name of command, option and position of UCS. 04

(d) Write the commands to prepare AutoCAD 3D drawing of the given figure 2. Specify the name of command, option and position of UCS. 04

OR

(d) Explain any four 2D commands used in AutoCAD with suitable example. 04

Q.4 (a) Explain AutoCAD surface modeling command REVSURF, TABSURF and RULE SURF with suitable example. 03

OR

(a) Explain AutoCAD command CYLINDER, LOFT and SLICE with suitable example. 03

(b) Write any four importance features of Creo software. 04

OR

(b) Write any four importance features of Unigraphics software. 04

(c) Explain the procedure for making a 3D solid model Fig 1. in any one parametric solid modeling software. 07

Q.5 (a) Write any four importance features of Solid Edge or Inventor software. 04

(b) Explain the procedure for making a 3D solid model Fig 2. in any one parametric solid modeling software. 04

(c) Explain Extrude and Sweep command used in AutoCAD with sketch. 03

(d) Explain any three important constrains used in Creo or Unigraphics modeling software. 03

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FIGURE 1

FIGURE 2

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