Winter 2016 Computer Aided Design Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING - SEMESTER–IV • EXAMINATION – WINTER - 2016
Subject Code: 3341904 Date: 24- 11-2016     
Subject Name: Computer Aided Design
Time: 02:30 PM TO 05:00 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.Enlist various input and output devices for CAD workstation

2.Enlist various CAD software packages for modeling.

3.List any four file extensions used in various CAD software.

4.Explain in brief RAM and ROM

5.Write the full form of   GUI, CADD, CSG , B-rep.

6.List any four assembly constraints used in parametric modeling.

7.State any four advantages of CAD system.

8.Enlist any four commands used for surface modeling in AutoCAD.

9.Draw block diagram of design process with use of CAD.

10.Explain in brief REVSURF command used in AutoCAD.

Q.2 (a) Explain 2D translation with suitable illustration 03

OR

(a) Explain 2D scaling with suitable illustration 03

(b) Define CAD and enlist its functional area. 03

 OR 

(b) Explain UCS in context of AutoCAD. 03

(c) Prepare sample specifications / configuration of computer system suitable forsolid
modeling CAD software. 04

OR 

(c) Draw the block diagram of CAD work station and explain in brief. 04

(d) Explain Feature based modeling. 04

 OR 

(d) Write short note on constructive solid geometry (CSG) method of modeling. 04

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

OR

(a) Explain parametric modeling in brief. 03

(b) Differentiate between 2D and 3D models. 03

 OR

(b) Explain Boolean operation in AutoCAD  (1)Union (2) subtract 03

(c) Explain AutoCAD  commands (1)box (2) cylinder 04

OR

(c) Explain AutoCAD  commands (1)3D Rotate (2) 3D Mirror 04

(d) Enlist various constraints used in parametric sketching. Explain any two. 04

  OR

(d) Enlist types of printers. Explain 3-D printer. 04 

Q.4 (a) Discuses steps to create solid model shown in Figure-1 in any parametric modeling
 software. Write name of software. 10

(b) Explain features of any one of parametric modeling CAD software. 04

 OR 

(b) List benefits of Assembly Modeling in parametric modeling software. 04

Q.5 (a) Write AUTOCAD detailed procedure with commands to prepare 3D modelgiven in figure-2. Show intermediate sketches with UCS position. 14

Figure-1 - Que: 4(a)

Figure-2 - Que: 5(a)

                                         

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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.
.
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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Summer 2015 Metrology and Instrumentation Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
Diploma Engineering - SEMESTER–IV • EXAMINATION – SUMMER • 2015
Subject Code: 3341905 Date: 15-05-2015
Subject Name: Metrology and Instrumentation
Time: 10:30 am - 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. English version is considered to be Authentic.

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Q.1 Answer any seven out of ten. 14

1. Name the parts of vernier caliper.

2. Why wringing is required?

3. Find the least of the vernier with minimum of 0.5mm on main scale and 50
vernier divisions.

4. Define straightness.

5. What is the use of Talysurf Tester?

6. State the full form i)CLA ii)RMS

7. Name the 2 methods to measure gear tooth thickness.

8. State the elements of external thread.

9. Name 4 limit gauges.

10. Name 4 temperature measuring devices.

Q.2 (a) List the linear measuring instruments and define quality control. 03

OR

(a) Differentiate accuracy and precision 03

(b) What is least count? How to find the least count of height gauge? 03

OR

(b) Write the uses of surface plate. 03

(c) Draw the labeled diagram of vernier calliper 04

OR

(c) Draw the labeled diagram of micrometer. 04

(d) Draw the diagram of slip gauge indicating 50mm and active faces Write the
uses of slip gauges. 04

OR

(d) Draw the labeled of bevel protactor. 04

Q.3 (a) Draw the symbol of surface roughness with complete detail 03

OR

(a) Draw symbol of i)Roundness ii)Parallelity iii)Perpendicularity 03

(b) State the advantages of non destructive testing. 03

OR

(b) Name the NDT methods. 03

(c) Explain with diagram roundness measurement. 04

OR

(c) Explain the working of dial indicator with diagram 04

(d) Explain dye penetration method of testing. 04

OR

(d) Explain the working of sine bar with diagram. 04

Q.4 (a) List the types of gear and explain module 03

OR

(a) Name 4 pressure measuring device and draw diagram of ‘U’ tube manometer. 03

(b) Explain the working of bellow type flow meter. 04

OR

(b) State the advantages and disadvantages of limit gauge. 04

(c) Explain the measurement gear tooth thickness with diagram 07

Q.5 (a) Explain the measurement of major diameter of bolt. 04

(b) Explain the working of thermocouple 04

(c) Name the various types of transducers 03

(d) Explain plug gauge with the help of diagram 03

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