**Q1. What is CATIA V5?**

**CATIA** (Computer-Aided Three-Dimensional Interactive Application ) is a multi-platform software suite for computer-aided design (CAD), computer-aided manufacturing (CAM), computer-aided engineering (CAE), PLM and 3D, developed by the French company Dassault Systèmes.

**Q2. What is the difference between Autocad and Catia?**

**AutoCAD** is a commercial computer aided design and drafting software application. It was developed by Autodesk. It can be used for both 2D and 3D designing. Autocad is said to have best drafting features. Whereas **CATIA** ,an acronym of computer aided three-dimensional interactive application.

**Q3. What is the save extension of sketcher file?**

.CATPart

**Q4. Which is the tool used to exit from sketcher workbench to part design workbench?**

Exit sketcher

**Q5. What is positioned sketch?**

you can can orient a sketch plane according to your requirement then you can sketch its positioned sketch.

**Q6. what is sketch analysis?**

Sketch analysis is used to check the profile is open or close, and to convert some profiles in to Reference elements and to delete. and also used to check the sketch is constrained or not.

**Q7. What is SHOW/HIDE option?**

Show mode enable us to see all the components presently opened and in Hidemode we canhide the desired elements from the view for time being.

**Q8. What are the default units of LMT (Length, Mass and Time)**

mm, Kg, Second.

**Q9. How many dimensions are required to constrain the ellipse?**

Three dimensions are required namely major axis, minor axis and the distance from the origin.

**Q10 . What are different conic sections?**

Ellipse, Hyperbola and Parabola

**Q11. What is RHO value for ellipse, Parabola and hyperbola?**

Parabola has RHO values of 0.5, Ellipse has RHO value between 0 & 0.5 and Hyperbola has RHO value b/w 0.5 &1.0.

**Q12. What is the function of mirror command in sketch?**

Mirror command in sketch will create a copy of the sketch about a reference plane.

**Q13. If I donor want the relation b/w original and mirrored elements what should I do?**

Explore and the relation b/w the original and mirror element doesn’t exit.

**Q14. . What is the use of isolate in sketcher workbench?**

Isolated is used when 3D geometry is projected on to a sketch in order to be modified and used as part of the sketch’s profile.

**Q15. What is NURBS?**

Nurbs are the type of curves

**Q16. How many types of Co-ordinate systems are there?**

Three namely Cartesian, Polar and Spherical co-ordinate system.

**Q17. How many degrees of freedom are there for points, lines, circles & ellipse in 2dimensions?**

Degree of freedom for points & ellipse is 2 for circles it is 3 & for ellipse it is 5 in two dimensions.

**Q18. What is the meaning of mean dimension?**

Mean dimension is the dimension that should be mean of all the dimensions, which are tolerance.

**Q19. How many types of environment are available to start CATIA?**

1. From desktop (motif)

2. From console (dterm)

**Q20. What are project 3D silhouette edges?**

Project 3D silhouette edges in sketcher will shows how to create silhouette edges to be used in as geometry or reference elements.

**Q21. What is SKETCH TOOLS in sketcher work bench & Explain the Importantance of it?**

SKETCH TOOLS in sketcher workbench are the commands, which find very use in creating sketches. SKETCH TOOLS are namely geometric and dimensional constraints, construction elements/standard elements and Grid option. They play very important role in sketching, whenever we want to constrain a sketch we use these options and if we want to convert any element into a construction element once again these options come into picture.

**Q22. What is the use of Cut Part by Sketch Plane?**

This task shows how to make some edges visible. In other words, we are going to simplify the sketch plane by hiding the portion of the material that is not needed for sketching.

**Q23. How do you measure arc length?**

We can measure arc length by using MEASURE ITEM command. Sometimes we need to customize the option for arc length if it is not checked earlier using customization in MEASURE ITEM command.

**Q24. What is the meaning of true dimension?**

True dimension is the dimension desired after the machining. In other words, this is the value that should be attained after the machining

**Q25. What do you mean by ISO-Constraints?**

If all of the degrees of freedom of geometry have been takes up by a consistent combination of dimensions & fixed geometry. That geometry is said to be ISO-CONSTRAINED. Geometry that still has some degrees of freedom is said to be UNDER constrained.