1. What's the difference between Raster Graphics and Vector Graphics? correct answers Raster Graphics are resolution based graphics. Whereas Vector Graphics are based on mathematical formulas defining geometric primitive. Pixelization
2. What's the benefits of employing CAD system in Mechanical ...
IET 226 MIDTERM EXAM REVIEW || A+ Graded Already.
1. What's the difference between Raster Graphics and Vector Graphics? correct answers Raster
Graphics are resolution based graphics. Whereas Vector Graphics are based on mathematical
formulas defining geometric primitive. Pixelization
2. What's the benefits of employing CAD system in Mechanical Design Perspective? correct
answers Computer assisted systems, increase productivity of the designer, improve quality of
design, improve communication through more efficient documentation and provide a multi-
purpose data base.
3. Which other system can take benefits of geometry created by CAD system? correct answers
CAM (Computer Aided Manufacturing), FEA,FEM (Finite Element Analysis; Finite Element
Method), CFD (Computation Fluid Dynamics), and Kinematics (Motion Analysis).
4. Three major Tasks of 3D CAD Design correct answers Part Modeling (Sketch Mode, Feature
Creation, and Part Editing), Assembly Modeling (DOF-Degree of Freedom, Assembly Constrain,
and CAD Library), and Drafting(Detail Part Drawing, GD&T, Assembly Drawing)
5. What is CAM and what is major purpose of CAM? correct answers CAM (Computer Aided
Manufacturing) to make connection between machining and CAD
6. What is FEA/FEM? What types of solution does it provided? correct answers FEA,FEM
(Finite Element Analysis/Method) provides structural analysis vibration analysis, fatigue
analysis, and thermal analysis.
7. What is CFD? List examples of problem solved by CFD? correct answers CFD (Computation
Fluid Dynamics) is the analysis of the fluid and thermal flow. Ex. The flow of hot water through
pipes.
8. What are the three major interests of Motion Analysis (Kinematics)? correct answers
Kinematics (Motion Analysis) is motion analysis of path, speed, and acceleration. As well as
Mechanism analysis.
9. The milestone of CAD system for IBM PC? Name the company and product. correct answers
AutoCAD (Autodesk, 1982)
10. Which CAD system was developed based on solid geometry and feature-based parametric
techniques for defining parts and assemblies first time in history? correct answers Pro/Engineer
(PTC, 1987) CREO
11. What does CATIA stand for? correct answers Computer Aided Three-Dimensional
Interactive Application
12. What is the Kennel of CATIA? correct answers Convergence Geometric Modeler (Dassault
Systems)
, 14. Two major solid modeling methodologies in modern 3D CAD systems correct answers
(Sweep) Boundary Representation (B-Rep) and Construction Solids Geometry (CSG)
(Primitives)
13. Name CAD systems utilizing Parasolid Kennel. correct answers Simens NX, SolidWorks,
Solid Edge, MasterCAM...
15. What is Primitives? correct answers Primitives are limited versions of part models that are
designed for repeated use in a part creation.
16. Name common Primitives found in modern CAD systems correct answers Cone, Cylinder,
Wedge, Sphere, Box, Pyramid, Torus
17. Type of Sweep correct answers Revolve, or Groove
18. What is Boolean Operation? correct answers The combination of two feature within a model.
Either by subtraction, union, intersection or complex union.
19. What is CSG? correct answers Constructive Solid Geometry (Map of feature)
20. What is B-Rep (Boundary Representation)? How does it work? correct answers Is the
Representation of edges, vertexes, surface, and faces of givens planes/faces of a model.
21. How is "Parametric Modeling" defined in CAD systems? correct answers It originates from
mathematics, refers to the se of certain parameters or variables that can be modified to change
the output of the equation.
22. Why "Parametric Modeling" is important in CAD systems? correct answers The essential
constraints can be altered by manipulating parameters to determine/modify the shape and size of
the model.
23. What is the benefit of employing the Parametric Modeling methodology? correct answers
Enables much greater level of precisions and also prevents many errors both in design process as
well as manufacturing.
24. What is Feature-based modeling? correct answers Traditional and predominant method of
creating 3D models in CAD/CAM software.
25. What is the benefits of Feature-based Modeling? correct answers The benefits are you can
edit every detail of the model.
1. Name the three Workbenches covered in class? correct answers Part Design, Assembly,
Drafting
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