Unigraphics NX Interview Questions and Answers
Unigraphics NX Interview Questions and Answers
Unigraphics NX Interview Questions and Answers
Find the most asked and preferred Unigraphics NX 6.0/7.0/ 7.5/ 8.0/ 8.5/ 9.0 interview questions
with answers for written test.
When you open Unigraphics, you are in the Gateway application because this application is a
pre-requisite to all other application.
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.
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.
Note: Save your file where command prompt showing location; Example:-
C:/users/username
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.
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.
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)
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.
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.
1. Airthmatic Expressions
2. Conditional Expressions
3. Geometric Expressions
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.
we can use Undo for 222 times or until up to last time saved.
Grip programs can be executed as button action by specifying grip executable file names. The
uses of Grip are
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.
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.
1. Solid Modeling
2. Feature Based Modeling
3. Free Form Modeling
4. Sheet Metal Feature Modeling
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.
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.
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.
Constraints limit structural movement and represent mounts and supports. Constraints can be
applied to faces or edges. (Restricting the degree of freedom)
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.
27) What is Co-ordinate System? How many types of Co-ordinate Systems are there in
Unigraphics?
Co-ordinate System is a reference element. It uses X,Y and Z co-ordinates while creating
model.
28) What is the difference between Rotational WCS & Dynamic WCS?
In Rotational WCS we can give the angle by which the WCS need to rotate by typing it in the
space provided, while in Dynamic WCS we can dynamically rotate the WCS and give the
angle.
29) What is the difference between Sketch Curves & Basic Curves?
Sketch curve are parametric and can constrain but basic curves are non parametric and cannot
constrain them.
30) How many types of geometrical constrains are there in Unigraphics NX?
32) In which command do you find strings, apex string, and spline string?
We find the Bounded plane command in Insert –> Surface –> Bounded Plane.
The idea of virtual assembly taken to its logical conclusion leads to Master Model paradigm.
In this concept a master model of the component is designed and the same is referred by
those in assembly, drafting, analysis and manufacturing department of the particular
company.
35) What is the displayed part and work part. Where does it come?
Displayed parts are the parts which can only be displayed but not editable while we can both
display and edit a work part. Both displayed part and work part comes under assembly.
In Reattach, You can reattach a already created sketch to a different planar face or datum
plane.
String mode is an option which is available while creating lines and arc using basic curves.
When the string mode is selected we can draw continuous lines or arc. If the string mode is
not selected we can create only one line or arc at a time.
Reference set controls the the amount of data that is loaded from each component and viewed
in context of an assembly. (Data likes Datum Planes, Axis, Solid body, Sheet body,
Sketches, Curves etc)
In top down assembly we create the different parts in the same assembly file and assemble it
there itself.
In bottom up assembly we create the different parts of an assembly in separate file and then
get them and assemble using constraint.
There are 8 mating constraints in assembly. Mate, Align, Angle, Parallel, Perpendicular,
Center, Center, Distance and Tangent.
42) How many ways to find the sketch is fully constrained in Unigraphics?
There are three ways to find the sketch is fully constrained. 1) In sketch environment (status
bar) 2) In part navigation 3) Checkmate
Expand command is used in Drafting. In the drafting application you can use expand to create
and edit objects in specific view.
Section strings is defined as the curves which represent the section of the profile in Sweep
along guide or Swept command.
By using single segment option in Tube we get a single smooth solid along the guide curve.
The law curve option lets you create a spline using the law Sub-function. A law spline is
defined by a set of X, Y, and Z components. You must specify a law for each of these three
components.
49) What is the default tolerance for angle and distance in Unigraphics?
Primitive features are the basic analytic shapes. They are non associative, meaning they are
not associated to geometry used to create them.
There are four primitives. They are Block, Cylinder, Cone and Sphere.
We will use primary strings and cross strings in Through Curve Mesh option for creating a
free form feature.
55) How many numbers of characters can be used for part file name?
56) What is the difference between Face blend and Soft blend?
A face blend can be created between the faces of solid and / or sheet bodies. The faces can be
non adjacent and/ or part of a different sheet body.
Soft blends let you create blends whose cross sectional shape is not circular.
57) What is the difference between datum plane and fixed datum plane?
A Datum plane is a reference plane that serves as aid when existing planes are not available.
The datum plane can be editor later. The fixed datum plane are datum planes which cannot be
edited later.
We can identify by going to Information –> Others –> Object – specific –>
Dimension with Manual Text.
60) What is the maximum number of guide curves used in Swept operation?
The maximum number of guide curves used in Swept operations is Three (3).