Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem Old 161903 Computer Aided Design Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:161903 Date:10/05/2019
Subject Name: Computer Aided Design
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.
Q.1 (a) Distinguish Between Conventional Design and Computer Aided Design
system with CAD architecture
07
(b) A triangle ABC having coordinates A(15,15), B(25,25) and C(15,35) is rotated
by 30
0
clockwise about the vertex B. Determine the new vertex positions after
rotation.
07
Q.2 (a) Explain Bresenham?s algorithm for generation of line 07
(b) What is a geometric transformation? Define and explain the following with
respect to 2-D transformations (any three)
(i) Translation (ii) rotation (iii) scaling (iv) reflection
07
OR
(b) What is graphic standard? Explain different CAD standards 07
Q.3 (a) What is feature based modelling? Discuss various steps involved in creation of
models using features.
07
(b) A Bezier curve is to be constructed using control points P0(35, 30), P1(25, 0),
P2(15, 25) and P3(5,10). The Bezier curve is anchored at P0 and P3. Find the
equation of the Bezier curve and plot the curve for u= 0, 0.2, 0.4, 0.6, 0.8 and 1.
07
OR
Q.3 (a) Derive the parametric equation in matrix form for Hermite Cubic spline.
07
(b) Enlist the various methods of geometric modelling. Discuss wire frame
modelling in detail.
07
Q.4 (a) Explain the various steps required to solve mechanical problem using finite
element analysis.
07
(b) An axial stepped bar as shown in figure is subjected to an axial pull of 50 kN. If the
material of the bar is uniform and has a modulus of elasticity as 200 GPa.
Determine the displacement and stresses of each of the section.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:161903 Date:10/05/2019
Subject Name: Computer Aided Design
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.
Q.1 (a) Distinguish Between Conventional Design and Computer Aided Design
system with CAD architecture
07
(b) A triangle ABC having coordinates A(15,15), B(25,25) and C(15,35) is rotated
by 30
0
clockwise about the vertex B. Determine the new vertex positions after
rotation.
07
Q.2 (a) Explain Bresenham?s algorithm for generation of line 07
(b) What is a geometric transformation? Define and explain the following with
respect to 2-D transformations (any three)
(i) Translation (ii) rotation (iii) scaling (iv) reflection
07
OR
(b) What is graphic standard? Explain different CAD standards 07
Q.3 (a) What is feature based modelling? Discuss various steps involved in creation of
models using features.
07
(b) A Bezier curve is to be constructed using control points P0(35, 30), P1(25, 0),
P2(15, 25) and P3(5,10). The Bezier curve is anchored at P0 and P3. Find the
equation of the Bezier curve and plot the curve for u= 0, 0.2, 0.4, 0.6, 0.8 and 1.
07
OR
Q.3 (a) Derive the parametric equation in matrix form for Hermite Cubic spline.
07
(b) Enlist the various methods of geometric modelling. Discuss wire frame
modelling in detail.
07
Q.4 (a) Explain the various steps required to solve mechanical problem using finite
element analysis.
07
(b) An axial stepped bar as shown in figure is subjected to an axial pull of 50 kN. If the
material of the bar is uniform and has a modulus of elasticity as 200 GPa.
Determine the displacement and stresses of each of the section.
07
2
OR
Q.4 (a) Figure below shows the bar with dimensions and loads. Determine the nodal
displacements, element stresses, if the temperature rises by 60
0
C.
Assume the modules of elasticity for the complete bar as 200 GPa and
coefficient thermal expansion as 12 x 10
-6
per
0
C.
07
(b) Discuss Johnson method of optimum design. 07
Q.5 (a) Briefly discuss about B-spline curve and Bezier curve.
07
(b) Explain 2-D and 3-D elements used in finite element analysis. 07
OR
Q.5 (a) Explain following with respect to design optimization
(1) Design vector
(2) Objective function
(3) Constraint
07
(b) List various approaches used for creating solid models. Discuss about Constructive
solid modelling (C-Rep) and Boundary representation (B-Rep) approaches.
07
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This post was last modified on 20 February 2020