# Finite Element Method Questions and Answers – Desirable and Undesirable Features of FEA Packages

This set of Finite Element Method Multiple Choice Questions & Answers (MCQs) focuses on “Desirable and Undesirable Features of FEA Packages”.

1. Any Finite Element Analysis package should be supported by an excellent pre processor only.
a) True
b) False

Explanation: A good Finite Element Analysis package should be supported by both excellent pre and post processors. Pre processor helps in the model preparation, by allowing constraint generation, load application etc. Whereas, a post processor helps to investigate the results obtained in various forms by taking in inputs from the user.

2. How can we increase the limit on degrees of freedom handled by any respective software?
a) Increasing the type of elements accepted
b) Processor should not make use of symmetry in stiffness matrix
c) Processor should make use of symmetry in stiffness matrix
d) Increasing the variety of loads applicable

Explanation: Limitation on degrees of freedom is expected to be very high for any specified software. To enable the same, processor should make use of banded nature and symmetry in the stiffness matrices. Repeated calculations of stresses and strains can also be avoided to facilitate this cause.

3. Shell type elements should not be incorporated in a Finite Element Analysis package.
a) False
b) True

Explanation: The element library of all good Finite Element Analysis packages should incorporate all types of elements like 1D, 2D, 3D, shell elements, and plate elements. 1D elements include points, 2D include lines, whereas 3D elements include structures. Shell elements are 3D elements which have very small thickness. Plate elements are three/four node elements found in the 3D plane.

4. Which of the following cannot be performed using a Finite Element Analysis package?
a) Non linear analysis
b) Dynamic analysis
c) Static analysis
d) Data analysis

Explanation: A Finite Element Analysis package enables us to perform various types of analysis. These include – static, linear, non linear, dynamic, thermal, crash analyses etc. Data analysis cannot be performed using a Finite Element Analysis package. A good Finite Element Analysis package should have a higher number of options when it comes to types of analyses performed.

5. Which of the following is not a Finite Element Analysis package?
a) Ansys
b) Abaqus
c) SolidEdge
d) Autodesk simulation

Explanation: Ansys, Abaqus, and Autodesk simulation are all examples of good Finite element analysis packages. SolidEdge is not one of them, it is a CAD modeling software. Ansys is a US based package, Abaqus is owned by Dassault Systems (same company that owns Catia), and Autodesk Simulation is the FEA package from Autodesk.

6. Which of the following is an advantage of a Finite Element Analysis package?
a) High investment
b) Safe simulation of impractical load conditions and failure modes
c) Complexity of User interface
d) Requirement of skilled users

Explanation: Safe simulation of impractical load conditions and failure modes is a big advantage of any Finite Element Analysis package. High investment, complexity of user interface used to be disadvantages of older versions of Finite Element Analysis packages, which have now been overcome. Requirement of skilled users is still a prerequisite to make use of these Finite Element Analysis packages.

7. Software developers are thriving to make the packages more user friendly.
a) True
b) False

Explanation: Today, there are many FEA packages out there in the market. This provides the user with a wide variety of choice and leisure to choose the package that suits his/her requirements. In such a competitive environment, it becomes necessary that Software developers thrive to make the packages more user friendly.

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