Computer Aided Design Question Bank

ANNA UNIVERSITY-CHENNAI

REGULATION 2013

ME6501-COMPUTER AIDED DESIGN

TWO MARKS QUESTIONS WITH ANSWERS 

UNIT-2

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1.Write down the advantages of surface modeling.

1. Surface modeling can be used to check the real look of the product with coloring and shading.
2. Surface modeling can be used to perform interference checking.
3. As the surface models precisely define the part geometry such as surface and boundaries, they can help to produce machine instructions automatically.
4. Complex surface features can be created very easily.
5. Un ambiguities in the interpretation of object is less than wire frame models by using the provision of hidden line removal.

2.What is CGS?
Constructive solid geometry (CSG) is a method used in solid modeling for creating 3D models in CAD. Constructive solid geometry permits a modeler to make a complex surface by applying Boolean operators to join objects. Frequently CSG presents a model/surface that appears visually complex, but is essentially little more than cleverly combined.

3.Write down two important solid modeling technique.
The solid modeling techniques permit for the automation of some complicated engineering calculations that are approved as a part of the design progression. Simulation, planning, and confirmation of processes such as machining and assembly were one of the initiations for the
development of solid modeling technique.

4.Write down ‘Free form surface’.
Freeform surface is used in CAD and other computer graphics software to describe the skin of a 3D geometric element. Freeform surfaces do not have rigid radial dimensions, unlike regular surfaces such as planes, cylinders and conic surfaces.

5.Define ‘focus’ of a curve.
In geometry, the focus is pair of special points with reference to which any of a variety of curves is constructed.

6. Write a short note ‘Hermite curve’.
A Hermite curve is a spline where every piece is a third degree polynomial defined in Hermite form: that is, by its values and initial derivatives at the end points of the equivalent domain interval.

7.Define Conic section.
A conic section is a curve created as the intersection of a cone with a plane. In analytic geometry, a conic may be described as a plane algebraic curve of degree two, and as a quadric of dimension two.

8.Write down the eccentricity value for ellipse, parabola and hyperbola. 

The value of eccentricity less than one is ellipses, those with eccentricity equal to one are parabolas, and those with eccentricity greater than one is hyperbolas.

9.Define Quadratic Bezier curve.

 

As shown in the figure, a quadratic Bezier curve is the path defined by the function B(t), given
points P0, P1, and P2,B(t)={(1-t) (1-t)P0=tp1=t(1-t)p1=tp2}

10.List out properties of B-Spline.
i. The maximum order in every parametric direction is limited to the number of describing polygon vertices in that path.
ii. The surface is changeable to an affine transformation.
iii. The deviation diminishing property of B-spline surface is not well recognized.
iv. The control of any polygon net vertex is limited to ±p/2, ±q/2 spans in the particular parametric direction.
v. If the number of polygon net vertices is equal to the order of basis in that dire.

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ME6501 COMPUTER AIDED DESIGN 2 MARKS WITH ANSWERS

ANNA UNIVERSITY-CHENNAI

REGULATION 2013

ME6501-COMPUTER AIDED DESIGN

TWO MARKS QUESTIONS WITH ANSWERS 

UNIT-1 

1.List out fundamentals of product life cycle management.
1. Customer Relationship Management (CRM)
2. Supply Chain Management (SCM)
3. Enterprise resource planning (ERP)
4. Product Planning and Development (PPD).

2.What is conceptualization in design process?
A Concept Study is the stage of project planning that includes developing ideas and taking into account the all features of executing those ideas. This stage of a project is done to reduce the likelihood of assess risks, error and evaluate the potential success of the planned project.

3.Define Product cycle.
Product cycle is the process of managing the entire life cycle of a product from starting, through design and manufacture, to repair and removal of manufactured products.

4. Differentiate preliminary design and detailed design.
Preliminary design Detailed design
The preliminary design fills the gap between the design concept and the detailed design phase. The system configuration is defined, and schematics, diagrams, and layouts of the project will offer early project configuration. In detailed design and optimization, the parameters of the part being produced will change, but the preliminary design focuses on creating the common framework to construct the project.
The next phase of preliminary design is the Detailed Design which may includes of procurement also. This phase builds on the already developed preliminary design, aiming to further develop each phase of the project by total description through drawings, modeling as well as specifications.

5.What is ‘Rendering’?
Rendering is the making of a two dimensional image from a three dimensional model by means of computer programs. A picture file has objects in a strictly defined data structure; it would have information of geometry, lighting, viewpoint, texture, and shading as a description of the scene.

6.State the importance of Computer Architecture in CAD.
In CAD, Computer architecture is a set of disciplines that explains the functionality, the organization and the introduction of computer systems; that is, it  describes the capabilities of a computer and its programming method in a summary way, and how the internal organization of the system is designed and executed to meet the specified facilities.

7.Define concurrent engineering and state it's advantages:
In concurrent engineering, various tasks are handled at the same time, and not essentially in the standard order. This means that info found out later in the course can be added to earlier parts, improving them, and also saving time. Concurrent engineering is a method by which several groups within an organization work simultaneously to create new products and services.

Advantages:

1.Both product and process design run in parallel and take place in the same time.
2. Process and Product are coordinated to attain optimal matching of requirements for effective
quality and delivery.
3. Decision making involves full team involvement.

8.What do you understand by the term ‘Texture Mapping’?
Texture mapping is a system for providing detail, surface texture and color to a computer- generated graphic model. A texture map is used to the surface of a polygon. This process is like to sticking patterned paper to a plain white paper. Multi texturing is the use of more numbers of textures at
a time on a polygon.

9.What are the steps involved in architecture implementation?
Computer architecture engages different aspects, including instruction set architecture design, logic design, and implementation. The implementation includes Integrated Circuit
Design, Power, and Cooling. Optimization of the design needs expertise with Compilers, Operating Systems and Packaging.

10.Describe Computer Aided Design.
CAD is the function of computer systems to support in the creation, modification, analysis, or optimization of a design. CAD software is used to raise the productivity of the designer, progress the quality of design, progress communications through documentation, and to generate a database for manufacturing. 


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For all units of CAD and other mechanical engineering subjects study materials is uploaded see right side of the page you can download whatever materials you need to study or copy and paste the following link :annaunivstudymaterials.blogspot.com