Winter 2015 Computer Aided Design Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – IV-EXAMINATION – WINTER 2015
Subject Code: 3341904 Date: 05/12/2015
Subject Name: Computer Aided Design
Time: 10:30 AM TO 1:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.

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Q.1 Answer any seven out of ten.  14

1.List four uses of Computer graphics Technology.

2.Write the definition and concept of CAD.

3.Explain Two dimensional Scaling.
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4.State the different types of Geometrical modeling.

5.Draw the block diagram of CAD workstation.

6.Explain UCS.

7.List the operation covered in Pro-E.

8.Define “Parametric Feature Based Modeling”.

9.Write some feature of Sold Edge.

10.Write the full form of HTML, CAE, PROM and CAM.

Q.2 (a) Define CAD and write any five advantages of CAD system. 03

OR

(a) List at least six functional area of CAD. 03

(b) Write the reasons for implementing CAD system. 03

OR

(b) Enlist any six output devices with their applications. 03

(c) Using suitable illustration, explain 2D transformation. 04

OR

(c) Define computer graphics. How it is beneficial to CAD. 04

(d) Explain following terms (1) Pixel (2) Resolution (3) GUI (4) Frame buffer. 04

OR

(d) Enlist types of printers. List advantages and disadvantages of any one. 04

Q.3(a)Differentiate between wire frame, surface and solid modeling. 03

OR

(a) Differentiate 2D modeling and 3D modeling with example. 03

(b) Explain parametric modeling in brief. Explain its application. 03

OR

(b) Write short note on Constructive Solid-Geometry Methods (CSG) of modeling. 03

(c) Explain the different graphics packages used for modeling. 04

OR

(c) Explain different coordinate system in AutoCAD with suitable example. 04

(d) Explain any four command used for surface modeling in AutoCAD. 04

OR

(d) Explain CAD 3D Primitives and its defining parameters in brief for SPHERE, CUBE, CYLINDER and CONE. 04

Q.4 (a) Explain following AutoCAD command with example.
(1) TABSURF (2) 3D ARRAY (3) RULESURF 03

OR

(a) Explain SLICE, UNION and WCS AutoCAD command in brief with suitable example. 03

(b) Answer following. (i) What are the file extensions given to parts? Assemble? Drawing? Sketches? (ii) Explain parent /child relationships in Creo. 04

OR

(b) Write down AutoCAD command to prepare surface model of the fig.1. 04

(c) Write steps to prepare an AutoCAD 3D model of the given fig.2.Specify the name of the command, option and position of UCS. 07

Q.5 (a) Write the commands to prepare solid model of the given fig3 by using Pro-E(Creo). 04

(b) Explain assemble modeling in Pro-E (Creo) with suitable example. 04

(c) Enlist type of parametric modeling of CAD soft ware. Write feature of any one. 03

(d) Explain various constraints used in Pro-E (Creo) solid modeling. 03

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Figure 1

Figure 2

Figure 3

All dimensions in mm