Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 7th Semester (Seventh Semester) 2015-2016 EME 701 Computer Aided Design Question Paper
(Following Paper ID and Roll No. to be filled in your
Answer Book)
Roll No. l
B.Tech.
(SEM. VII) THEORY EXAMINATION, 2015-16
COMPUTER AIDED DESIGN
[Time:3 hours] [Total Marks:100]
Section-A
]. Attempt all parts. All parts carry equal marks. Write
answer ofeach part in short. (10><2=20)
(a) Diferentiate between random and raster scan.
(b) What do you mean by order of continuity of
curves?
(c) Mention the differences between interpolation and
approximation.
((1) Describe any two differences between Bezier curve
and Cubic spline curve.
21500 (1) P.T.O.
Differentiate between plane surface and ruled
surface with neat sketch.
zK.
(D
\_a
(1") What is Bezier surface?
(g) Describe the most common primitives used. in
solid modelling brie?y.
(h) List the differences between CAD/CAM.
(i) Define Element Stiffness Matrix.
( i) What are various sweep representations and discuss
anyone.
Section?B
Attempt any ?ve Questions from this section. (10:61.50)
?7
J
Explain the method to generate the surface ofrevolution.
Find the point (025. 90?) on the surface ofrevolution
ofa line segment with endpoints: ('1, 1. 0) and (5, 2, 0).
This line segment is rotated about x axis.
How the B-spline surface is generated? What are the
continuity conditions that are required for a B?spline
patch?
2 l 500 ' (2) EME-701
-1'
9.
Determine the parametric representation of the line
segment between the position vectors P1 [1 1] and P2
[4 5]. What are the slope and tangent vector for this line?
Explain the Bresenhem?s line drawing algorithm and write
the steps for linejoining points (20, 10) and (30, 18).
Discuss the RGB and CMY model ofeolour and explain
the importance ofeolour in CAD/CAM application.
Derive the mid-point circle algorithm and show various
steps for a circle radius r=10 for the ?rst quadrant from
. =0 t0 x=y.
Explain and derive matrix for the following
transformation 2D transformations:
a) Re?ection b) Shear
c) Sealing d) Rotation
Consider the assemblage of three springs as shown in
?g. 1. Calculate the displacement of the nodal points 2
and 3.
(l) (2) (3)
l 2 3 4
?\A /\/\/?*?/\/\/\/\/?*??\/\/\/ \r?E
? V 200 N V
2 Nlmm 2 N/mm 6 N/mm
Fig.1
21500 (3) P.T.O.
Section?C
Attempt any twc questions from this section (2 X15230)
10.
11.
Derive parametric equation of Bezier curve using
Bernestien poiynomiai. Also ?nd the equation ()fBez;ier
curve and its mid-point using four control points
('20, 20)? (60, 80), (120, 100) and (150, 30).
Write parametric equation 0f1~1ermite cubic spline curve
and derive the basic function matrix for it. Also ?nd the
mid?point ofa Hermite cubic spline with the two points
as (1, 1)(6, 5) and tangent vectors as (0, 4) and (4, 0).
A tapering round bar is ?xed at one end and a tensile
load of 1000 N is applied at the other end as shown in
?g. 2. Take elastic modulus. E==2><105MPa. Find the
global stiffness matrix and displacements considering
its as 4 elements.
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21 500 (4) EME-701
This post was last modified on 29 January 2020