CATIA interview Questions and Answer

Q1- What do you know about CATIA?
Ans- CATIA- Computer Aided three dimensional Interactive Application.

• Catia is great for generative shape design and has a really advanced surface modeling module.
• CATIA is product life cycle management software which has all required Tool like CAD, CAM, CAE, ergonomics analysis, more advance CFD, etc
• CATIA used for bigger and huge projects like e.g aerospace,automobile design and development

Q2- Part file extension?
Ans- .CATPART.

Q3- Drawing file extension?
Ans- CATDRAWING

Q4- Kernel of CATIA?
Ans- CNEXT

Q5- STEP File meaning?
Ans-  Standard for the exchange of products.

Q6 - what are default unit of length, Time and mass?
Ans - Length- mm
           Mass- Kg
          Time- second

Q7 - what is thickness of surfaces?
Ans- infinity less.

Q8 - what is hybrid modeling ?
Ans- mixture of solid and surface modeling.

Q9 - How many degree of freedom in assembly?
Ans- 6

Q10 - How many degree of freedom for point in sketch?
Ans- 2

Q11 - Can we use non- planer surfaces for sketch?
Ans- No

Q12- what is the full form of IGES?
Ans- Initial graphics exchange  specification.

Q13 - How we can use any command more then one time (continue) in Catia?
Ans- By selecting double click we can use any command (tool) more then one time.

Q14- Difference b/w geometrical and dimensional constraints?
Ans- Geometric constraint is a relationship that forces a limitation b/w one or more geometric elements.
Dimensional constraint is a constraint, whose value determines the geometric object measurement.

Q15- Expamd CAM/CAD/CAE/PLM/VPM/VPDM/CFD.
Ans- CAM- Computer aided Manufacturing
         CAD- Computer aided Designing
         CAE- Computer aided Engineering
        PLM- Product life cycle management
        VPDM-  Virtual product data management
         VPM-  Virtual product module
         CFD- Computational fluid dynamic.

Q16- What is difference between add and assembly in catia v5?
Ans-  Add is the Boolean operation which is used to add the material no matter whether it is positive feature or negative feature but assembly is the one which considers if it is positive feature it adds material and if it is negative feature it removes material

Note: Positive feature are the options used to add material like pad, shaft, rib, multi section solid..... etc
negative feature are the options used to removes material like pocket, groove, slot, remove multi section solid.....etc
Add & Assembly Difference - Click Here

Q17- Save extension of assembly file?
Ans- .CATProduct

Q18- What do CATIA P1, CATIA P2, and CATIA P3 means?
Ans- P1,P2 and P3 will indicate the different types of platforms of CATIA, Higher the number, Sophisticated will be the software.

Geometric Dimensioning and Tolerancing (GD&T)

GD&T-

• GD&T is a symbolic language for defining and communicating engineering tolereances.
• Used to specify the size, shape, form, orientation, and location of features on a part.
• GD&T was created to insure the proper assembly of mating parts, to improve quality, and to reduce cost.
• Drawings with properly applied geometric tolerancing provide the best opportunity for uniform interpretation and cost-effective assembly.

History-
DuringWorldWar II, the United States manufactured and shipped spare parts, Many of these parts were made to specifications but would not assemble.They recognized that producing parts that do not properly fit or function is a serious problem since lives depend on equipment that functions properly. To find a way to insure that parts would properly fit and function every time. The result was the development of GD&T.
GD&T has been credited to a man named "Stanley Parker", who developed the concept of "true position".
Ultimately, the USASI Y14.5–1966 document was produced on the basis of earlier standards and industry practices. The following are revisions to the standard:
ANSI Y14.5–1973 (American National Standards Institute)
ANSI Y14.5M–1982
ASME Y14.5M–1994 (American Society of Mechanical Engineers)
The 1994 revision is the current, authoritative reference document that specifies the proper application of GD&T.

Three important advantages over the coordinate tolerancing system:

• The cylindrical tolerance zone
• The maximum material condition
• Datums specified in order of precedence

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Solution 1- active REALVIEW GRAPHICS in solidworks 2016/17

1.Open the registry (Run -> regedit)
2.Go at -"HKEY_CURRENT_USER>SOFTWARE>Solidworks>SOLIDWORKS 2015>Performance>Graphics>Hardware>Current"
3. Double click on the "Renderer" key and copy the text under "Value Data". For example, for the GTX 770 mine was "GeForce GTX 770/PCIe/SSE2"
4.Go at -"HKEY_CURRENT_USERSOFTWARE>Solidworks>SOLIDWORKS 2016>Performance>Graphics>Gl2Shaders>NV40" 

* In solidworks folder, there will be that software+version name which is installed in system"

Ex-

"HKEY_CURRENT_USERSOFTWARE>Solidworks>SOLIDWORKS 2015>Performance>Graphics>Gl2Shaders>NV40" 

Or

"HKEY_CURRENT_USERSOFTWARE>Solidworks>SOLIDWORKS 2017>Performance>Graphics>Gl2Shaders>NV40"

5.Right-click on the NV40 folder on the left pane and select "New -> Key"
6.Rename the new key with what was copied in step #3
7.The only key in this folder should be a "(Default)" key
8.Right-click on the right pane and select "New -> DWORD (32-bit) Value"
9.Name this new key "Workarounds"
10.Double-click on the "Workarounds" key and enter the value "30408". You should be in Hexadecimal mode.
11.RealView should now be available. If it is not, try setting the value in step #10 to "31408" or "30008".

(3) GD&T Symbols - Diameter, Radius, Controlled Radius and Spherical Radius/Dia

• Diameter (ø) -
  Indicates a circular feature when used on the field of a drawing or indicates that tolerance is  diametrial when used in a feature control frame.
                 OR
   Diameter symbol replaces the word "Diameter". It should be used anywhere there is a diameter on the drawing,abd when a tolerence zone is cylindrical.
  
  Ex-
  
  
  
• Radius (R)-   A straight line extending from the center of an arc or circle to its surface.
  
  
  EX-
  
  
  
  
  

Controlled Radius (CR)-  Creates a tolerance zone defined by two arcs (the minimum and maximum radii) that are tangent to the adjacent surfaces. Where a controlled radius is specified, the part contour within the crescent-shaped tolerance zone must be a fair curve without flats or reversals. Additionally, radii taken at all points on the part contour shall neither be smaller than the specified minimum limit nor larger than the maximum limit.
The Abbreviation CR is defined by 1994 standard to indicate a controlled radius dimension.

• Spherical Radius (SR) Or Spherical Diameter (Sø)- 
  
  Spherical Diameter - shall precede the tolerance value where the specified tolerance value represents spherical zone. Also, a positional tolerance may be used to control the location of a spherical feature relative to other features of a part. The symbol for spherical diameter precedes the size dimension of the feature and the positional tolerance value, to indicate a spherical tolerance zone.
  
  SR
  Spherical Radius - precedes the value of a dimension or tolerance.
  
                               OR
  Spherical Features may be dimensioned by giving either the radius of diameter of a sphere.
  
  Ex-
  

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Visit for more technical notes and suppot. For plastic design :- Plastic Design For CATIA:- CATIA Tutorials For SolidWorks:- SolidWorks Tutorials For GD and T :- GD and T

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