Unigraphics (UG) NX Interview Questions and Answers

Unigraphics (UG) is one of the widely used CAD/CAM/CAE software in the world. Find below the Unigrpaics interview questions. Unigrahpics is one of the widely used CAD/CAM/CAE software in the engineering industry. Unigraphics is a family of integrated CAD/CAM/ CAE/PLM applications, which supports both product and process complexity inherent in the enigneering field.

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1) What do you mean by Gateway Application in UG?
Unigraphics functions are divided into applications of common capabilities, such as Modeling , NX Sheet Metal, Shape Studio, Drafting, Manufacturing, Assemblies etc. When you open Unigraphics, you are in the Gateway application because this application is a prerequisite to all other application.

2) What is Master Model Concept?
The same model is used from conceptual design to the Drafting, Assembly, Analysis and Manufacturing. The idea of a virtual assembly taken to its logical conclusion leads to Master Model paradigm. If you change any thing in Master Model, it will reflect in all other applications.

3) What do you mean by Team Center?
It is a PDM (Product Data Management) software which helps the organisation effectively control the design, development, analysis, manufacturing through out the product of life cycle.

4) How to convert a file created in mm to inches (conversion of units) in UG?
We can convert a file created in mm to inches by using UG command prompt.
ug_convert_part (space) -in (space) 1234.prt
Note: Save your file where command prompt showing location; Example:- C:/users/username

5) What is meant by UDF?
User defined feature is used to create the objects of different sizes in a single file. We can create our own form features that automate commonly used design elements. You can create and add the user defined features (UDFs) to target solids. You can define the shape and function of features, and create hierarchical libraries of features that are tailored to our need.

6) What is Promote body?
When you have an assembly that is work part, this option lets you promote a body from a loaded assembly component to the level of the assembly. The promote body remains associative to the original body, which is referred to as the base body.
Once you have promote a body, you can perform operations on it, such as adding features, performing Boolean operations between it and other bodies, and so on. The effects of these operations are only visible at the level of the assembly work part in which the promote was created, and in any other assembly that references that part.

7) What is Wave Link Geometry?
This option create an associate copy of composite curve, sketch, datum, point, face, body, mirror body of part file in assembly file. Once you have a wave linked boy you can perform operations on it. (Example: In Machining model you can add wave link of Casting model and perform the machining operations)

8) What is Extract Body?
This option create an associate copy of an entire body in part file. Features can then be added to Extract Body feature without appearing on the original body. You can also decide whether you want he Extract Body feature to update when the original body is changed.

9) What are Part families?
This option let you create a family of parts by creating a template part. You can use the Unigraphics spread sheet (via the Create button on the Part Families dialog) to create a table describing the various part family members.

10) What do you mean by Expressions?
Expressions are mathematical or conditional equations used to control the parameters of a model. With expressions, you can easily apply major edits to a model. By changing the expressions that control a specific parameter, you can re-size or re-position features of a solid model
Three types of Expressions are there
1. Airthmatic Expressions
2. Conditional Expressions
3. Geometric Expressions

11) What is Direct Modeling or Synchronous Modeling?
Direct modeling techniques represents extended capabilities for some of the more basic Unigraphics functions. Among these are face oriented operations, constraint based methods, blend regeneration and independence of feature history. You can use Direct modeling functions on models that have been imported from other CAD systems and are non-parametric.

12) What is the limit for Undo?
we can use Undo for 222 times or until up to last time saved.

13) How many colors in are there in UG?
There are 216 colors in UG.

14) How many Layers are there in UG?
There are 256 Layers in UG.

15) What are Grips? What are there uses?
Grip programs can be executed as button action by specifying grip executable file names. The uses of Grip are
4. Simplify Repetitive Operations
5. Standardized Results

16) What do you meant by Weight Management?
The Weight management option allow us to calculate and control the weight and other mass properties of parts, components and assemblies based on the solid bodies they contain.

17) What do you mean by Knowledge Fusion?
The Unigraphics NX Knowledge Fusion application provides a graphical user interface that allows us apply engineering knowledge driven rules and design intent to geometric models and assemblies in Unigraphics.

19) What is Parasolid?
Para solid is form of translator which is used to open the higher version Unigraphics part files to in lower version of Unigraphics. For example we can open the NX7.5 version part files in NX4.

20) How can we create a mosquito coil?
We can create a mosquito coil by first creating an inclined helix curve and then projecting it to the bottom plane. Then we need to use the sweep along guide command.

21) What is Datum Plane? Why it is used?
Datum Plane is reference feature that can be used to as construction tool in building the model.

22) What is Datum Axis?
Datum Axis, which is a reference object you can use to create other objects, such as Datum planes, revolved features, and extruded bodies. Datum Axis can be either relative or fixed.

23) What is constraint?
Constraints limit structural movement and represent mounts and supports. Constraints can be applied to faces or edges. (Restricting the degree of freedom)

24) How many types of constraints are there?
There are two types of constraints.
1) Geometrical constraints 2) Dimension constraints

25) What is sketching plane?
To create a sketch, you must associate the Sketch feature to a planar object. We can select a face or Datum plane. This plane is know as sketching plane.

More Unigraphics general interview questions:
1. Explain types of Modeling?
2. Explain types of Coordinate systems in Unigraphics?
3. What is reverse engineering?
4. What is continuity? Explain different types of continuity.
5. Advantages of UG over other CAD packages?
6. What are the types of dimensioning?
7. How to create your own symbols in drafting?
8. What is dual dimensioning?
9. What is the deference between break line details & bounded by objects?
10. What is the use of Reference sets?
11. How to insert sketch dimensioning & feature dimensioning in drafting?
12. Write the symbol for hole dimensioning?
13. What does the error message non manifold mean?
14. How to remove parameters of a model and retrieve it back?
15. What is view dependent edit?
16. What is the use of edit section components in view?
17. How to find out manually altered dimension?
18. How to reduce decimal places in information window?
19. What is the use of unfolded section cut in drafting?
20. How to fully constrain a spline in sketch?
21. What is routed relief?
22. What is Conditional Operator – Expression?

25. What is the use of part list?
26. What is the use of visible in view?
27. What is the use of overflows in blend?
28. What are silhouette curves?
29. What is combined projection?
30. What is swoop?
31. What is law curve?
32. What is rho?
33. What is the limit for undo?
34. How many colors are there in UG?
35. How is tube shown in model tree?
36. What is a pattern face?
37. Explain Heal geometry?
38. What is Para Solid?
39. What is direct modeling?
40. How do you export the model in STL format?
41. What is Timestamp?

Unigrahphics Tricky interview questions:
1. How to retrieve back the model you didn’t save (power problem or UG window closes due to some error)
2. How to edit the location of a detailed view?
3. How to convert a model created in inches to MM?
4. What is the limit for sheets in drafting?
5. How to create a mosquito coil?
6. How to create knurling?
7. How to taper 1/4 of a face?
8. How to blend a cone? How to convert a block to sphere (avoid blending)?
9. How to construct a block with a line in a single operation?
10. Advantages of surface modeling over solids
11. Advantages of solid modeling over surfaces
12. Which is the alternative to unite?
13. How to find Center of Gravity?
14. What is Degree of Freedom? How many degree of freedom will be there for a mechanical object?