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Reg. No. :
M.E. DEGREE EXAMINATION, JANUARY 2010
First Semester
CAD/CAM
CC 9211 COMPETITIVE MANUFACTURING SYSTEMS
(Regulations 2009)
Time: Three hours Maximum : 100 Marks
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. What are the different numerical control interpolation methods for continuous
path control?
2. State the recommendations and principles that can be applied in product
design to facilitate automated assembly.
3. List the various uses of parts classification and coding scheme.
4. What are the benefits that can be expected from an FMS?
5. What are the advantages of system simulation?
6. List atleast four manufacturing data.
7. State the four principles of lean production.
8. Define Total Productive Maintenance.
9. What are the benefits of flexible work force?
10. Why is kanban system called a pull or demand system of inventory control?
Question Paper Code: W7616
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PART B (5 16 = 80 Marks)
11. (a) (i) What are the strategies for automation? Explain them. (10)
(ii) State the applications of industrial robots. (6)
Or
(b) (i) What are the additional features of CNC over NC? Explain them.
(10)
(ii) Discuss the principles of the concept Design For Assembly (DFA).
(6)
12. (a) The following table lists the weekly quantities and routings of ten parts
that are considered for cellular manufacturing in a machine shop. Parts
are identified by letters, and machines are identified numerically. For the
data given,
(i) Develop the part-machine incidence matrix. (4)
(ii) Apply the rank order clustering technique to the part-machine
incidence matrix to identify logical part families and machine
groups and (6)
(iii) Determine the most logical sequence of machine for the machine
groups identified. (6)
Part Weekly Quantity Machine Routing
A 50 327
B 20 61
C 75 65
D 10 651
E 12 3274
F 60 51
G 5 324
H 100 3247
I 40 247
J 15 561
Or
(b) (i) List the various functions performed by the computer control
system in FMS and describe them. (10)
(ii) State the situations where Group Technology (GT) and cellular
manufacturing can be applied. State the benefits of GT. (6)
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13. (a) (i) How are software and hardware selected for the applicants of
manufacturing automation? (10)
(ii) State the reasons why companies need databases. (6)
Or
(b) (i) State the factors that are critical to database design and explain
why. (10)
(ii) What are the applications of simulation in CAD/CAM? (6)
14. (a) (i) What are the several basic steps that would lead to start Total
Productive Maintenance? Explain them. (10)
(ii) State the conditions that need to be fulfilled in order to implement
JIT concept effectively. (6)
Or
(b) (i) Explain Poka Yoke systems with two examples. (10)
(ii) Discuss Hoshin planning with a case study. (6)
15. (a) (i) Discuss the effect of setup reduction on Economic Order Quantity
(EOQ) and Inventory Cost. Also state the various approaches for
setup time reduction. (10)
(ii) Compare lean production and mass production. (6)
Or
(b) (i) Discuss the characteristics of Just-In-Time (JIT). (10)
(ii) Explain how a simple kanban system works. (6)
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Reg. No. :
M.E. DEGREE EXAMINATION, JANUARY 2010
First Semester
CAD/CAM
CD 9211 COMPUTER APPLICATIONS IN DESIGN
(Common to M.E. Engineering Design, M.E. Product Design and Development and
M.E. Computer Aided Design)
(Regulation 2009)
Time: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. Illustrate the Scan-conversion process of a straight line in terms of pixel
position.
2. Write the mathematical expression to scale a straight line about a fixed point.
3. Write the parametric equation of a plane surface defined by three points 10 ,PP
and 2P .
4. Illustrate the difference between geometry and topology.
5. Sketch the four Boolean operations of a block and a cylinder B.
6. Illustrate translational and rotational sweep models.
7. Distinguish between hidden line removal and hidden surface removal models.
8. State the salient features of RGB color space.
9. Briefly explain the top-down assembly approach.
10. What is the importance of WCS method in the assembly model?
Question Paper Code: W7622
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PART B (5 16 = 80 Marks)
11. (a) Derive decision parameters for the Bresenhams circle generating
algorithm assuming the starting point as (0, 10) and generate the pixel
positions for one forth of a circle.
Or
(b) Explain the Cohen - Sutherland line-clipping approach with proper
sketches.
12. (a) A shaft is to transmit 10 kW power at 1500 rpm. The shaft is made of
medium carbon steel material. Write a C program to select the material,
design the shaft and create the CAD model.
Or
(b) A flange coupling is to transmit 5 kW power at 1500 rpm. The coupling is
made of cast iron. Write a C/LISP/FORTRAN program to design the
coupling and draw the production drawing of the coupling.
13. (a) Explain the following polyhedral object using B-rep elements and verify
the Euler equation for the same
(i) Simple Polyhedra.
(ii) Polyhedral object a face may have loops.
(iii) Objects with holes that do not go through the entire object.
(iv) Objects have holes that go through entire objects.
Or
(b) Sketch the following feature operations using CSG.
(i) Extruded
(ii) Revolved feature
(iii) Chamber
(iv) Loft feature
(v) Pocket
(vi) Shell
(vii) Fillet
(viii) Draft
(ix) Rib and
(x) Dimple.
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14. (a) Explain briefly with sketches any six tests used for hidden line
identification.
Or
(b) (i) List the differences and the similarities between nonlinear sweeps
and lofts.
(ii) Describe how the variable radius fillet works. When is such one
used?
15. (a) Fig. 15 (a) shows a pin and a block with their MCSs. The pin and the
instances to be assembled into the hole in the block. Use WCS and write
the transformation matrices to merge the three instances of B into A.
Part A Part B
Fig. 15 (a)
Or
(b) Use the bottom-up approach to create the model of the universal joint
shown in Fig. 15 (b)
Fig. 15 (b)
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Reg. No. :
M.E. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
First Semester
Computer Aided Design
CD 9211 COMPUTER APPLICATIONS IN DESIGN
(Common to M.E. CAD/CAM/M.E. Engineering Design and
M.E. Product Design and Development)
(Regulation 2009)
Time : Three hours Maximum : 100 Marks
Answer ALL questions
PART A (10 2 = 20 Marks)
1. For the position vectors ]3,2[1P and ]5,4[2P determine the parametric
representation of the line segment between them.
2. What is Bernstein basis function? How does it alter the shape of a curve?
3. Explain the parametric surface with two variables and mention its advantages.
4. For a given radius and centre point write Auto LISP command to draw circle.
5. Write down the Euler-Poincare formula to verify the topology of valid solid
models.
6. What are the neutral file translators?
7. What is visual realism? List the techniques used for visual realism.
8. Name the different types of light sources.
9. What are the various types of geometric tolerances?
10. What are the various animation techniques developed to simulate the
mechanism?
Question Paper Code : 97660
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PART B (5 16 = 80 Marks)
11. (a) What is clipping? Explain Liang-Barsky line clipping algorithm in detail
with examples. (16)
Or
(b) Explain the various types of surfaces used in a CAD model (16)
12. (a) (i) Explain a method to interface a programming language with a
typical drafting package in detail. (8)
(ii) Explain the principle of parametric modification of geometric
models. (8)
Or
(b) (i) List and explain standard tool bars available in any solid modeling
packages. (8)
(ii) Write an Auto LISP program to design and draft a solid disk type
flywheel for the given specifications.
Flexural energy : 40 Nm
Mean speed : 240 rpm
Permissible fluctuation of speed : 2%. (8)
13. (a) Write the Boolean set operations for CSG and Boundary representation
for the solid given below. (16)
Or
(b) (i) Explain IGES file structure with examples. (8)
(ii) Explain the concept of product data exchange using STEP in detail.
(8)
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14. (a) Write short notes on the following Hidden line removal algorithms.
(i) A buffer method. (4)
(ii) BSP Tree. (4)
(iii) Octree. (4)
(iv) Ray Casting method. (4)
Or
(b) (i) Describe the various shading algorithms in detail. (8)
(ii) Explain HSV and HLS coloring models (8)
15. (a) (i) Explain the worst case arithmetic method for tolerance analysis. (8)
(ii) Discuss how the surface area is calculated using CAD software. (8)
Or
(b) (i) Describe the various ANSI from tolerances with neat diagram. (8)
(ii) What are the mating conditions for assembly? Discuss. (8)
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Reg. No. :
M.E. DEGREE EXAMINATION, JANUARY 2010
First Semester
CAD/CAM
CC 9211 COMPETITIVE MANUFACTURING SYSTEMS
(Regulations 2009)
Time: Three hours Maximum : 100 Marks
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. What are the different numerical control interpolation methods for continuous
path control?
2. State the recommendations and principles that can be applied in product
design to facilitate automated assembly.
3. List the various uses of parts classification and coding scheme.
4. What are the benefits that can be expected from an FMS?
5. What are the advantages of system simulation?
6. List atleast four manufacturing data.
7. State the four principles of lean production.
8. Define Total Productive Maintenance.
9. What are the benefits of flexible work force?
10. Why is kanban system called a pull or demand system of inventory control?
Question Paper Code: W7616
3
2
1
3
2
1
3
2
1
W 7616 2
PART B (5 16 = 80 Marks)
11. (a) (i) What are the strategies for automation? Explain them. (10)
(ii) State the applications of industrial robots. (6)
Or
(b) (i) What are the additional features of CNC over NC? Explain them.
(10)
(ii) Discuss the principles of the concept Design For Assembly (DFA).
(6)
12. (a) The following table lists the weekly quantities and routings of ten parts
that are considered for cellular manufacturing in a machine shop. Parts
are identified by letters, and machines are identified numerically. For the
data given,
(i) Develop the part-machine incidence matrix. (4)
(ii) Apply the rank order clustering technique to the part-machine
incidence matrix to identify logical part families and machine
groups and (6)
(iii) Determine the most logical sequence of machine for the machine
groups identified. (6)
Part Weekly Quantity Machine Routing
A 50 327
B 20 61
C 75 65
D 10 651
E 12 3274
F 60 51
G 5 324
H 100 3247
I 40 247
J 15 561
Or
(b) (i) List the various functions performed by the computer control
system in FMS and describe them. (10)
(ii) State the situations where Group Technology (GT) and cellular
manufacturing can be applied. State the benefits of GT. (6)
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2
1
3
2
1
3
2
1
W 7616 3
13. (a) (i) How are software and hardware selected for the applicants of
manufacturing automation? (10)
(ii) State the reasons why companies need databases. (6)
Or
(b) (i) State the factors that are critical to database design and explain
why. (10)
(ii) What are the applications of simulation in CAD/CAM? (6)
14. (a) (i) What are the several basic steps that would lead to start Total
Productive Maintenance? Explain them. (10)
(ii) State the conditions that need to be fulfilled in order to implement
JIT concept effectively. (6)
Or
(b) (i) Explain Poka Yoke systems with two examples. (10)
(ii) Discuss Hoshin planning with a case study. (6)
15. (a) (i) Discuss the effect of setup reduction on Economic Order Quantity
(EOQ) and Inventory Cost. Also state the various approaches for
setup time reduction. (10)
(ii) Compare lean production and mass production. (6)
Or
(b) (i) Discuss the characteristics of Just-In-Time (JIT). (10)
(ii) Explain how a simple kanban system works. (6)
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Reg. No. :
M.E. DEGREE EXAMINATION, JUNE 2010
First Semester
Engineering Design
ED9211 CONCEPTS OF ENGINEERING DESIGN
(Common to M.E. Computer Aided Design and M.E. Product Design and
Development)
(Regulation 2009)
Time : Three hours Maximum : 100 Marks
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. Differentiate Serial Engineering from Concurrent Engineering.
2. Classify the three categories of Design standards.
3. Define House of Quality.
4. What are the essential elements of IPR?
5. Classify conceptual decomposition.
6. State the principle of prototyping.
7. State the importance of Value Engineering.
8. Define Material Performance Index.
9. Differentiate between MTBF and MTTF.
10. What is meant by Fractional Factorial Design?
PART B (5 16 = 80 Marks)
11. (a) (i) Explain the Morris Asimovs morphology of design with a block
diagram. (12)
(ii) State the characteristics of an environmentally responsible design.
(4)
Or
(b) Explain material cycle, product cycle and manufacturing process cycle
with neat sketches. (16)
Question Paper Code: J7671
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12. (a) (i) Explain the process of identifying customer requirements with
suitable example. (8)
(ii) Explain the procedure to solve ethical conflicts. (8)
Or
(b) (i) Explain the relationship between QFD and PDS and classify
ergonomics and aesthetic needs. (8)
(ii) Explain the various Sample Codes of Conduct. (8)
13. (a) (i) Discuss the various types of creativity methods. (8)
(ii) Generate Morphological chart for the design of a CD case. (4)
(iii) State the various levels in Pughs concept selection method. (4)
Or
(b) (i) Discuss in detail the levels and principle of Theory of Inventive
Problem Solving (TRIZ). (8)
(ii) Explain the axiomatic design and parametric design. (8)
14. (a) State the general design guidelines for Machining, Forging, Welding,
Casting, Metal forming and Assembly. (16)
Or
(b) (i) Explain in detail the weighted Property Index and Economics of
design. (8)
(ii) Explain the design criteria for fatigue, fracture and failure. (8)
15. (a) (i) Explain the different methods to improve reliability and discuss
about the cost of reliability. (8)
(ii) Explain the process of FMEA and state the importance of robust
design. (8)
Or
(b) (i) Derive the expression for reliability and explain about the system
reliability. (8)
(ii) Explain the various steps of hypothesis testing. (8)
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Reg. No. :
M.E. DEGREE EXAMINATION, JANUARY 2010
First Semester
Engineering Design
ED 9211 CONCEPTS OF ENGINEERING DESIGN
(Common to M.E. Computer Aided Design and
M.E. Product Design and Development)
(Regulations 2009)
Time: Three hours Maximum: 100 Marks
(Use of approved statistical and sampling inspection tables permitted)
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. What are the applications of CAE?
2. What are the disadvantages of bench marking?
3. What are the benefits of designing to codes and standards?
4. What do you mean by product liability?
5. Mention the steps to be followed to improve creative thinking.
6. What are the types of models in engineering design?
7. What are the factors to be considered while selecting material?
8. What do you mean by residual stress?
9. What are the applications of Weibull distribution?
10. What do you mean by maintainability?
Question Paper Code: W7644
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PART B (5 16 = 80 Marks)
11. (a) Discuss Asimovs detailed design process. (16)
Or
(b) (i) Explain concurrent engineering. (8)
(ii) Write a short note on extended product life cycle. (8)
12. (a) Explain QFD with a suitable example. (16)
Or
(b) (i) Explain general form of a contract. (8)
(ii) Discuss protecting intellectual property. (8)
13. (a) Write short notes on
(i) Decision tree (8)
(ii) Theory of inventive problem solving. (8)
Or
(b) (i) Describe optimization in detail. (8)
(ii) Explain finite element modeling packages. (8)
14. (a) (i) Describe the design for environment. (8)
(ii) Explain the design rules for environment. (8)
Or
(b) Explain material selection methods in detail. (16)
15. (a) (i) Explain in detail Reliability centered maintenance. (8)
(ii) List the benefits of design of experiments. (8)
Or
(b) Discuss FMEA with a suitable example. (16)
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Reg. No. :
M.E. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
Elective
Engineering Design
ED 9271 RAPID PROTOTYPING AND TOOLING
(Common to M.E. Product Design and Development and
M.E. Computer Aided Design)
(Regulation 2009)
Time : Three hours Maximum : 100 Marks
Answer ALL questions
PART A (10 2 = 20 Marks)
1. List any four advantages of RP in product design and development.
2. How does digital prototyping differ from virtual prototyping?
3. What is called road width in fusion deposition modeling?
4. Discuss any four limitations of laminated object manufacturing.
5. Describe Net shaped manufacturing.
6. What is meant by beam energy in electron beam melting? How is it
controlled?
7. Name any four different types of data formats.
8. Describe Adaptive slicing.
9. Sketch the advantages of break-away support system.
10. How does aerospace technology make use of rapid tooling applications?
Question Paper Code : 97790
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PART B (5 16 = 80 Marks)
11. (a) (i) Explain, with suitable example, how rapid prototyping and tooling
are the good examples as part of computer integrated
manufacturing. (8)
(ii) Develop a virtual prototype for hydraulic turbine. Draw suitable
process flow diagram and explain. (8)
Or
(b) (i) Draw the outline showing the history of development of RP systems
around the world. (8)
(ii) List any eight important benefits of RP & T. (8)
12. (a) (i) Discuss the benefits and limitations of stereolithography system. (8)
(ii) Explain the process of building an RP of flange coupling made of
polymeric sheets. (8)
Or
(b) (i) Make a note on the process of making a rapid prototype of ball
bearing assembly. (8)
(ii) Discuss on any four types of materials, their applications and the
processes in which they are used. (8)
13. (a) Explain, with suitable sketch, the process of manufacturing a prototype
of circular disc made of ceramic material. (16)
Or
(b) Sketch the process of electron beam melting, its application and
limitations. (16)
14. (a) (i) How is the design data processed in RP technology? Explain with
suitable example. (8)
(ii) Discuss on contour data processing to minimize the stair-case
effect in RP products. (8)
Or
(b) (i) Discuss the CAD model preparations. (8)
(ii) Describe any three types of geometric modeling techniques. (8)
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15. (a) (i) Discuss the process of making a rapid tool for blow moulding.
Assume your own example as product. (8)
(ii) Compare Direct and Indirect tooling with classic examples. (8)
Or
(b) (i) Discuss any four types of finishing processes adopted for rapid
prototypes. (8)
(ii) Write notes on the applications of RP&T in the following fields :
(1) Medical field
(2) Automotive engineering
(3) Electronic industries
(4) Architecture.
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Reg. No. :
M.E. DEGREE EXAMINATION, JUNE 2010
First Semester
CAD/CAM
CC9212 FINITE ELEMENT ANALYSIS IN MANUFACTURING
ENGINEERING
(Regulation 2009)
Time : Three hours Maximum : 100 Marks
Answer ALL Questions
PART A (10 2 = 20 arks)
1. Give one example for boundary value and initial value problems.
2. State the principle of variational formulation.
3. Differentiate between natural and essential boundary conditions.
4. State any four types of presenting results from post processing.
5. State the benefits of natural coordinate system.
6. Express the Jacobian matrix of a linear triangular element.
7. What are uses of gap element?
8. What is meant by chip separation criterion?
9. Name different methods of generation of mesh.
10. What is solution phase in ANSYS?
PART B (5 16 = 80 Marks)
11. (a) A steel rod of diameter =d 2 cm, length L = 25 cm, and thermal conductivity k = 50 W/m. C is exposed to ambient air T = 20 C with a
heat-transfer coefficient = 64 W/m2 C. Given that the left end of the
rod is maintained at a temperature of 0T = 120 C and the other end is
exposed to the ambient temperature, determine the temperature
distribution in the rod using a two-parameter Ritz approximation with
polynomial approximation functions. The equation governing the problem
is given by
02
2
=+
c
dx
d for 250
J7624 2
(b) The deflection of a beam on an elastic foundation is governed by the
equation ( ) 1/ 44 =+wxdwd , where x and w are dimensionless quantities. The boundary conditions for a simply supported beam are given by
transverse deflection = w = 0 and bending moment = ( )22 / dxwd = 0. By taking a two-term trial solution as ( ) ( ) ( )xfCxfCxw 2211 += with
( ) xxf sin1 = and ( ) xxf 3sin2 = , find the solution of the problem using the (i) Galerkin method and (ii) the least squares method.
12. (a) (i) Derive the stiffness matrix for a linear bar element. (6)
(ii) The stepped bar shown in Fig.12 (a) is subjected to an increase in
temperature, T = 80 C. Determine the nodal displacements and
elemental stresses. (10)
Stepper Bar
Fig. 12(a)
Or
(b) Rectangular fins are used to remove heat from the surface of a body by
conduction along the fins and convection from the surface of the fins into
the surroundings. The fins are 100 mm long, 5 mm wide, and 1 mm thick,
and made of aluminium with thermal conductivity k = 170 W/m C.
The natural convection heat transfer coefficient associated with the
surrounding air is ( = 35 W/m2 C) and the ambient temperature is
T = 20 C. Assuming that the heat transfer is one dimensional along the
length of the fins and that heat transfer in each fin is independent of the
others; determine the temperature distribution along the fins and the
heat removed from each fin by convection. Use two quadratic elements.
13. (a) The Cartesian (global) coordinates of the corners of a triangular element
are given by (6, 4), (12, 6) and (8, 12). The element is subjected to a
temperature change 100 C. Assuming plane stress condition finds the
load due to temperature change. Take E = 200 GPa, Poissons ratio = 0.3,
thickness of the element = 2 mm and coefficient of thermal expansion of
the element material = C/107 6 .
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Or
(b) The Cartesian (global) coordinates of the corner nodes of a quadrilateral
element are given by (1, 1), (5, 1), (6, 6) and (1, 4). The element
displacement vector q is given as [ ]T05.0,0,10.0,15.0,20.0,0,0=q . Find the elemental strains.
14. (a) (i) Explain the following with suitable examples:
(1) Incorporation of latent heat in finite element analysis of
castings.
(2) Crank-Nicholson algorithm. (8)
(ii) Discuss the prediction of grain structure in normalized carbon steel
plates using FEA in detail. (8)
Or
(b) (i) Explain the basic concepts of plasticity. How is plasticity concepts
incorporated in finite element analysis of metal forming processes?
(8)
(ii) Discuss briefly FEA of metal cutting of carbon steels including the
chip separation criteria. (8)
15. (a) (i) Explain with suitable example the three phases of FEA using a
commercial FEA software. (10)
(ii) How are material and processing characteristics given as input in
ANSYS and DEFORM? (6)
Or
(b) (i) Discuss the advantages and limitations of ANSYS and DEFORM
packages. (8)
(ii) Write down a computer program to find the displacements and
stresses in a stepped bar subjected to an axial load. (8)
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Reg. No. :
M.E. DEGREE EXAMINATION, JANUARY 2010
First Semester
CAD/CAM
CC 9212 FINITE ELEMENT ANALYSIS IN MANUFACTURING
ENGINEERING
(Regulations 2009)
Time: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. Give two examples for transient problems in manufacturing processes.
2. How does calculus of variations help Finite Element Analysis?
3. What are shape functions?
4. Write governing equation of one dimensional heat transfer problem.
5. What are natural coordinates?
6. What are isoparametric elements?
7. With what objective FEM can be applied to casting process.
8. Explain large deformation analysis.
9. How will you save the output file in any commercial FE Software?
10. What is the difference between implicit and explicit schemes?
Question Paper Code: W7617
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PART B (5 16 = 80 Marks)
11. (a) Briefly explain the principles of variational methods and weighted
residual methods with an example.
Or
(b) (i) What are boundary value problems? What are the advantages of
their variational formulation?
(ii) Explain the Ritz method solution to variational formulation of
boundary value problems with an example.
12. (a) Find the temperature distribution in the stepped fin shown in Figure. 1
using two one dimensional elements.
Figure. 1
Or
(b) Determine the nodal displacements, element stresses and support
reactions for the bar loaded as shown in Figure. 2.
Portion Material E (GPa) Area (mm2)
A Bronze 83 2400
B Aluminium 70 1200
C Steel 200 600
Figure. 2
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13. (a) For a standard beam element with two nodes and deflection and slope as
the two degrees of freedom per node derive interpolation functions.
Or
(b) (i) Derive shape functions for a quadrilateral element. Explain the
significance of shape functions. (10)
(ii) Write down the general form of the two dimensional field equation
and explain few of its applications. (6)
14. (a) (i) Critically examine the difficulties involved in analyzing plasticity
problems through FEM. (8)
(ii) Write a note on small incremental formulation. (8)
Or
(b) Write short notes on FE analysis of
(i) Metal casting (8)
(ii) Metal cutting. (8)
15. (a) Concisely explain all the steps involved in analyzing a beam problem
using any commercial FE Software.
Or
(b) Write an overview on important commercial FEA packages with their
application, merits and demerits.
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Reg. No. :
M.E. DEGREE EXAMINATION, JANUARY 2010
First Semester
CAD/CAM
CD 9221 INTEGRATED MECHANICAL DESIGN
(Regulations 2009)
Time: Three hours Maximum: 100 Marks
Use of Approved Design Data Book is permitted
Any required design data may be suitably assumed
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. Write the mathematical expression for Von-Misses stress for a two-
dimensional plane stress.
2. Distinguish between the design based on rigidity and the design based on
strength giving one practical example for each case.
3. The crank pin is to be connected in the bush and the dimensions for the bush
and crank pin are given in mm are 014.0000.030
+ ,
040.0062.030
. Find the maximum
clearance between the bush and the crank pin.
4. Why is the stress developed in a shaft under vibration found maximum in the
first mode compared with the subsequent modes?
5. What strength of the material is to be considered while designing the spur gear
parameter of minimum center distance? Why?
Question Paper Code: W7623
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W 7623 2
6. Define the following with respect to the gear
(a) Force along the line of action
(b) Normal module.
7. Specify the reasons for backlash in gears.
8. Define the following with respect to the gear-box
(a) Preliminary ray/speed diagram
(b) Kinematic arrangement.
9. What is the difference between self-energizing and self-locking in case of block
brakes?
10. What is the advantage of pivoted block brake over the rigid block brake?
PART B (16 + 16 + 48 = 80 Marks)
11. (a) A solid shaft is supported on two bearings 2000 mm apart and rotates at
340 rpm. A 20 involute gear D 300 mm diameter is keyed to the shaft at
a distance of 1500 mm to the left of the right hand bearing. Two pulleys
B and C are located on the shaft at distances of 700 mm and 1400 mm
respectively to the right of the left hand bearing. The diameters of the
pulleys B and C are 820 mm and 620 mm respectively. 50 hp is
supplied to the gear, out of which 30 hp is taken off in the pulley C and
20 hp from B. The drive from B is vertically downwards while C the
drive is downwards at an angel of 30 to the horizontal. In both the cases
the tension ratio is 2 and angle of lap equal to 160. The combined fatigue
and shock factors for torsion and bending are 1.5 and 2.0 respectively.
Design a suitable shaft taking working stress to be 42 MPa in shear and
86 MPa in tension. (16)
Or
(b) Design a gearbox of the headstock of a turret lathe having arrangement
for 9 spindle speeds ranging from 31.5 rpm to 1050 rpm. The drive is
from an electric motor of 5 hp at 1500 rpm. Design should include the
following :
(i) Preliminary ray diagram/speed diagram
(ii) Spur gear design
(iii) Kinematic arrangement. (16)
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W 7623 3
12. (a) A rope drum of an elevator having 650 mm diameter is fitted with a
brake drum of 1 m diameter. The brake drum is provided with four cast
iron brake shoes each subtending an angle of 45 degrees. The mass of the
elevator when loaded is 2000 kg and moves with a speed of 2.5 m/s. The
brake has a sufficient capacity to stop the elevator in 2.75 m.
Assuming the co-efficient of friction between the brake drum and shoes
as 0.2, find
(i) width of the shoe, if the allowable pressure on the brake shoe is
limited to 0.3 2mmN and
(ii) heat generated in stopping the elevator. (16)
Or
(b) Fig. 12 b shows the arrangement of two brake shoes, which act on the
internal surface of a cylindrical brake drum. The braking forces 1P and
2P are applied as shown and each shoe pivots on its fulcrum 1O and 2O .
The width of the brake lining is 45 mm. The intensity of the pressure at
any point in the shoe is 0.48 sin , where is measured as shown from
either pivot. The coefficient of friction is 0.40. Determine the braking
torque and the magnitude of the forces 1P and 2P . (16)
Note : All dimensions are in mm
Fig. 12 b
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W 7623 4
13. (a) Design the following components of a hoist
(i) Counter weight
(ii) wire rope for a high speed hoist and
(iii) beams
The following data are provided
Take maximum weight of the unloaded cage is equal to 970 kg and
weight of the rope to be balanced in 6% of the weight of the cage.
A speed of 42 kmph is to be reached while traveling at a distance of
10 m from rest. The sheave is carried on 2 similar (RSJ) rolled steel
Joists, where the center distance is 340 mm. The location of the
sheave on the middle of the beam of span 3.8 m. (48)
Or
(b) The Back gear mechanism of a lathe is to have a speed reduction from
cone pulley to the spindle of 8:1 with a centre distance 200 mm
approximately. The gears used are of 20 full-depth involute spur gears.
The drive is obtained from a 25 cm diameter pulley fixed into a 3 hp
motor running at 480 rpm. The pulley drives another pulley 45 cm
diameter on cross-section which carries a 3-stepped cone pulley of 35 cm,
25 cm and 15 cm diameter. The safe working stress for shaft and key
material is 42 MPa in shear. The safe tension per cm width of the belt is
200 N. Ratio of tension 21 TT = 3. Safe stress in the arm of pulley is
35 MPa. Other data if needed may be assumed. Design the following
(i) Main hollow spindle
(ii) Belt
(iii) Gears
(iv) Intermediate shaft (Lay shaft)
(v) Bearing. (48)
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Reg. No. :
M.E. DEGREE EXAMINATION, JUNE 2010
Elective
Computer Aided Design
ED9250 OPTIMIZATION TECHNIQUES IN DESIGN
(Common to M.E. Product Design and Development)
(Regulation 2009)
Time : Three hours Maximum : 100 Marks
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. Distinguish between linear programming problem and integer programming problem.
2. Define golden section. What is its value?
3. What are inequality constraints? Give an example from design of mechanical elements.
4. Why are penalty function methods, called indirect methods/techniques?
5. What does multistage optimization refer? Give an example.
6. State the principle behind the working of Artificial Neural Networks.
7. Define transverse load. Give any two examples.
8. State at least two geometric constraints with respect to design of shafts.
9. Define dynamics and highlight the difference between designing the mechanical elements subjected to static and dynamic loads.
10. What is mechanism? Why is it important in Machine Design?
Question Paper Code: J7676
.
.
J7676 2
PART B (5 16 = 80 Marks)
11. (a) (i) In the context of nonlinear programming problems, distinguish between various types of optimization techniques (solution finding methods). (6)
(ii) A beam A is to be welded to a rigid support member B. The welded beam is to consist of 1010 steel and is to support a force F of 25000 N. The dimensions of the beam are to be selected so that the system cost is minimized. Formulate the optimization problem for the above case. (10)
Or
(b) (i) Why is simplex method (LP problem solving method) not suitable for nonlinear programming problems? Is there any technique to get optimum for NLP problems? Elaborate your answer. (6)
(ii) It has shown that the allocation of gear ratios in a triple-reduction spur-gear train for minimum inertia with an overall reduction of 10 reduces to the minimization of the following function. Use the HookeJeeves method and carry out at least two iterations to approximate x with ( ) [ ]Tx 5.0,5.00 = . (10)
( ) ( )
++
+++=
101100112 4
21
22
21
21
222
1xx
xxx
xxxf .
12. (a) An open cylindrical vessel is to be constructed to transport 80 m 3 of grain from a warehouse to a factory. The sheet metal used for the bottom and sides cost Rs. 800 and Rs. 100 per square meter, respectively. If it costs Rs. 10 for each round trip of the vessel, find the dimensions of the vessel for minimizing the transportation cost. Assume that the vessel has no salvage upon completion of the operation.
Or
(b) Consider the problem :
Minimize ( ) ( ) ( )222121 21, += xxxxf subject to
02 21 = xx and 51
J7676 3
13. (a) (i) Define multi-objective optimization problem? Why normalization is required during solving these problems? Give two examples for multi objective optimization problems. (6)
(ii) Discuss in detail on simulated annealing algorithm. (10)
Or
(b) Explain in detail the optimization of fuzzy systems. Highlight all the theories used in the methodology.
14. (a) Consider the design of the two-bar truss shown in Fig. 1 with the location of nodes 1 and 2 and the area of cross section of bars as design variables. If the weight and the displacement of node 3 are to be minimized with constraints on the stresses induced in the bars along with bounds on the design variables, formulate the optimization problem and suggest the suitable solution techniques.
Fig. 1
Or
.
.
J7676 4
(b) Consider the cone clutch given in Fig. 2 and formulate the optimization problem for minimization of volume of the clutch. Assume uniform pressure conditions. Suggest a solution methodology.
Fig. 2
15. (a) A uniform column of rectangular cross section (b X d) is to be constructed for supporting a water tank of mass M. It is required to minimize the mass of the column for economy, and to maximize the natural frequency of transverse vibration of the system for avoiding possible resonance due to wind. Formulate the problem of designing the column to avoid failure due to direct compression and buckling. Assume all other relevant data.
Or (b) Consider the four bar mechanism and state the inversions of it along
with their applications. Formulate optimization problem for each inversion. Comment on models. Are the models same? Are the objectives and decision variables same?
421
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Reg. No. :
M.E. DEGREE EXAMINATION, JANUARY 2010
First Semester
CAD/CAM
MA 9213 PROBABILITY AND STATISTICAL METHODS
(Regulations 2009)
Time: Three hours Maximum: 100 marks
Statistical Tables to be provided
Answer ALL Questions
PART A (10 2 = 20 Marks)
1. A red die and a blue die are rolled together. What is the probability of getting a
number 4 on red die and 1 on blue die?
2. Find the moment generating function of Poisson distribution.
3. If ,56.0,40.0,80.0 231312 === rrr find the value of 3.12r .
4. State the principle of least squares.
5. State the conditions for the validity of 2 test.
6. List any two uses of t-test.
7. What is the aim of the design of experiments?
8. Name three basic designs of experiment.
9. Give any two merits of method of moving averages.
10. Define Auto regressive process of order p.
Question Paper Code: W7665
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PART B (5 16 = 80 Marks)
11. (a) (i) Two persons A and B toss an unbiased coin alternately on the
understanding that the first who gets the head wins. If A starts the
game, find their respective chances of winning. (8)
(ii) Two random variables X and Y have joint probability density
function
2( , ) , 0 1, 0 23
0, elsewhere
xyf x y x x y= +
=
Show that X and Y are not independent. (8)
Or
(b) (i) The probability of a man hitting a target is 0.25. If he fires 7 times,
what is the probability of his hitting the target at least twice? (8)
(ii) Find the correlation coefficient between X and Y. (8)
X : 92 89 87 86 83 77 71 63 53 50
Y : 86 83 91 77 68 85 52 82 37 57
12. (a) (i) For random sampling from a normal population, find the maximum
likelihood estimators for the population variance when the
population mean is known. (8)
(ii) Obtain the regression equation of 3X on 1X and 2X from the data
given below : (8)
,39.4,26.2,03.56,48.51,95.55 21321 ===== XXX
.974.0,581.0,578.0,41.4 2313123 ==== rrr
Or
(b) (i) In a trivariate distribution, 1.0,4.0,5.0 231312 === rrr . Obtain the
partial correlation coefficient 3.12r and multiple correlation
coefficient 23.1R . (8)
(ii) Estimate and in the probability density function
,)(
)( 1 xexxf
= x0 by the method of moments. (8)
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W 7665 3
13. (a) (i) Random samples of components manufactured by two machines
were taken. From machine A, 80 components were tested and 5
were found to be defective whereas 100 components from machine B
revealed 9 to be defective. Is there evidence that the two machines
differ in their performance? (8)
(ii) Two random samples drawn from two normal populations are given
below : (8)
Sample I : 24 27 26 21 25
Sample II : 27 30 32 36 28 23
Test if the two populations have the same variance.
Or
(b) (i) Eleven articles produced by a factory were chosen at random and
their weights were found to be (in kgs) 63, 63, 66, 67, 68, 69, 70, 70,
71, 71 and 71. Can we assume that the mean weight of the articles
produced by the factory is 66 kgs? (8)
(ii) 200 digits were chosen at random from a set of tables. The
frequencies of the digits were
Digits : 0 1 2 3 4 5 6 7 8 9
Frequency : 18 19 23 21 16 25 22 20 21 15
Test the hypothesis that the digits were uniformly distributed in
the table. (8)
14. (a) The following is a Latin square design of five treatments. Analyze the
data and interpret the results. (16)
A 13 B 9 C 21 D 7 E 6
D 9 E 8 A 15 B 7 C 16
B 11 C 17 D 8 E 10 A 17
E 8 A 15 B 7 C 10 D 7
C 11 D 9 E 8 A 11 B 15
Or
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(b) The number of automobiles arriving at 4 toll gates were recorded for a
two hours time period for each of six working days :
Toll Gate
I II III IV
Monday 200 228 212 301
Tuesday 208 230 215 305
Day Wednesday 225 240 228 288
Thursday 223 242 224 212
Friday 228 210 235 215
Saturday 220 208 245 200
Determine whether the rate of arrival (i) is the same at each toll gate
(ii) differ significantly during the six days or not. (16)
15. (a) (i) Calculate the 3 yearly moving averages of the production figures
given below : (8)
Year 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
Production
(in tons) :
15 21 30 36 42 46 50 56 63 70 74 82 90 95 102
(ii) Find the mean and variance for the first order autoregressive
process. (8)
Or
(b) Calculate 5-yearly and 7-yearly moving averages for the following data of
the number of commercial and industrial failures in a country during
1982 to 1997. Also plot the actual and trend values on a graph. (16)
Year : 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
No. of
failures :
23 26 28 32 20 12 12 10 9 13 11 14 12 9 3 1
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Reg. No. :
M.E. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
First Semester
CAD/CAM
MA 9213 PROBABILITY AND STATISTICAL METHODS
(Regulation 2009)
Time : Three hours Maximum : 100 marks
Answer ALL questions.
PART A (10 2 = 20 marks)
1. Define Poisson distribution.
2. Write down the Pearsons Correlation coefficient.
3. What is meant by Multiple Correlation?
4. What are the characteristics of good estimator?
5. Write down the formula for Chi-square test for goodness of fit. ?
6. What are the assumptions for validity of ANOVA?
7. What do you mean by local control?
8. What is called as n2 factorial experiment?
9. What is meant by time series?
10. What is termed as trend?
Question Paper Code : 97769
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PART B (5 16 = 80 marks)
11. (a) (i) Define random variable. Give an example. (4)
(ii) The mileage C in thousands of miles which car owners get with a certain kind of tyre is a random variable having probability density function.
( )
0for,0
0for,20
1 20/
=
>=
x
xexf x
Find the probabilities that one of these tyres will last
(1) at most 10,000 miles,
(2) anywhere from 6,000 to 24,000 miles,
(3) at least 30,000 miles. (12)
Or
(b) (i) Comment the following:
The mean of a binomial distribution is 3 and variance is 4. (8)
(ii) The mean and variance of binomial distribution are 4 and 4/3
respectively. Find ( )1>XP . (8)
12. (a) In a partially destroyed laboratory record of an analysis of correlation data, the following results only are legible:
Variance of X = 9
Regression equations: 8X 10Y + 66 = 0, 40X 18Y = 214.
Find
(i) the mean values of X and Y
(ii) the correlation coefficient between, X and Y, and
(iii) standard deviation of Y? (16)
Or
(b) In random sampling from normal population N( , 2 ), find the
maximum likelihood estimators for
(i) when 2 is known
(ii) 2 when is known. (16)
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13. (a) Two random samples gave the following results : (16)
Sample
Size
Sample mean
Sum of squares
of deviation from the mean
1 10 15 90
2 12 14 108
Test whether the samples come from the same normal population at 5% level of significance.
Or
(b) Three sides of an equilateral triangle were measured by 5 pupils with the following results. Are there any significant differences between (16)
(i) the measurements of the pupils,
(ii) the sides of the triangle?
Pupils
A B C D E
Sides
a 5.44
5.41
5.43
5.42
5.43
b 5.43
5.41
5.42
5.43
5.44
c 5.45
5.42
5.43
5.43
5.44
14. (a) Consider the results given in the following table for an experimental involving six treatments in four randomized blocks. The treatments are indicated by numbers wit/tin parentheses. (16)
Yield for a randomized block experiment Treatment and yield
Blocks
1 (1) (3) (2) (4) (5) (6)
24.7
27.7
20.6
16.2
16.2
24.9
2 (3) (2) (1) (4) (6) ( 5)
22.7
28.8
27.3
15.0
22.5
17.0
3 (6) (4) (1) (3) (2) (5)
26.3
19.6
38.5
36.8
39.5
15.5
4 (5) (2) (1) (4) (3) (6)
17.7
31.0
28.5
14.1
34.9
22.6
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97769 4
Test whether the treatments differ significantly. Also determine the critical difference between the means of any two treatments.
Or
(b) The following table gives the layout and the results of a 32 factorial design laid out in four replicates. The purpose of the experiment is to determine the effect of different kinds of fertilizers Nitrogen N. Potash K and Phosphate P on potato crop yield. Analyse the data and give your comments.
32 FACTORIAL EXPERIMENT LAID OUT IN 4 BLOCKS
Block I
nk kp p np
291
391
312
373
l k n nkp
101
265
106
450
Block 2
kp p k nk
407
324
272
306
n nkp
np I
89 449
338
106
Block 3
p l np kp
323
87 324
423
nk k n nkp
334
279
128
471
Block 4
np nk n p
361
272
103
324
k I nkp
Kp
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302
131
437
435
15. (a) Fit a straight line to the following data by the least squares method. (16)
Year 2004
2005
2006
2007
2008
2009
Export of Cotton Textiles
49 54 60 73 80 96
and also find out short period fluctuations.
Or
(b) Explain the general auto-regression scheme of order k. (16)
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Reg. No. :
M.E./M.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
Common to ME CAD/CAM /ME Computer Integrated Manufacturing
Elective
219079 RAPID PROTOTYPING
(Regulation 2010)
Time : Three hours Maximum : 100 marks
Answer ALL questions.
PART A (10 2 = 20 marks)
1. Mention the importance of RP in product development.
2. What is meant by virtual prototyping?
3. List down the various digitization techniques.
4. What is meant by adaptive slicing?
5. What are the materials used in Stereolithography?
6. State the limitations of LOM.
7. What is the need of post curing in powder based RP systems?
8. List down the various applications of LENS.
9. Differentiate between solid based and powder based 3DP systems.
10. What is the principle of Shape Deposition Manufacturing?
Question Paper Code : 33250
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33250 2
PART B (5 16 = 80 marks)
11. (a) (i) Give a brief account on the development of RP systems. (8)
(ii) Explain shortly about RP process chain. (8)
Or
(b) (i) Enumerate the impact of Rapid tooling on product development. (8)
(ii) Explain the principle, benefits and applications of Digital
prototyping. (8)
12. (a) (i) Discuss briefly about data processing for Rapid prototyping. (6)
(ii) Explain the step-by-step procedure involved in CAD model
preparation for Rapid Prototyping systems. (10)
Or
(b) (i) Explain in detail about support generation and support structure
design. (10)
(ii) Discuss shortly about Tool path generation. (6)
13. (a) (i) Explain the pre-building, part building and post-building processes
involved in Stereolithography. (12)
(ii) What are the limitations of SLA? (4)
Or
(b) (i) Explain the principle and operation of Fused Deposition Modeling
with a neat diagram. (12)
(ii) Discuss shortly the strength and weakness of SGC. (4)
14. (a) With the help of a neat diagram, explain the principle of working,
benefits and limitations of SLS.
Or
(b) (i) With reference to a case study, explain the operation of Laser
Engineering Net Shaping. (12)
(ii) State the limitations of LENS. (4)
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33250 3
15. (a) (i) Give a detailed account on Liquid based 3DP systems. (10)
(ii) Discuss briefly about Selective Laser Melting method of Rapid
prototyping. (6)
Or
(b) Explain the following :
(i) Shape decomposition. (6)
(ii) Electron beam melting. (6)
(iii) Rapid manufacturing. (4)