This set of Finite Element Method Multiple Choice Questions & Answers (MCQs) focuses on “Post Processing”.

1. Which of the following is a characteristic of contour plots?

a) Represents three dimensional graphs in 2D space

b) Represents two dimensional graphs in 3D space

c) Represents one dimensional graph in 2D space

d) Represents two dimensional graph in 1D space

View Answer

Explanation: Contour plot can be defined as the graphical representation of three dimensional surface on 2D mediums. It is usually done with x and y axes along x direction and the z direction is plotted by converting them to z slices which depict the third dimension of the surface under consideration.

2. What are the inputs to a CONTOURA program?

a) Vectors, scalars and numerical data

b) Coordinates, connectivity and function data

c) User input and values

d) Program code

View Answer

Explanation: The CONTOURA program is used to plot contour plots represented by its nodal values. The inputs are the coordinates, connectivity and function data which is read from the data files. The first part allows us to find the function limits and number of plot levels. The second part deals with the boundary region plotting and drawing of constant value lines.

3. What distinguishes the two programs – CONTOURA and CONTOURB ?

a) CONTOURA plots color bands

b) Both programs plot color bands

c) CONTOURB plots color bands

d) No program plots color bands

View Answer

Explanation: Both programs (CONTOURA and CONTOURB) are used for plotting contour plots. The inputs to both the program remain same, they both work for 4 noded quadrilateral elements. The only difference being that CONTOURB plots colored bands by filling in color in closed sub regions of the element.

4. What type of stresses should be calculated when tackling with ductile materials?

a) Maximum principal stress

b) Minimum principal stress

c) Maximum shear stress

d) Von mises stress

View Answer

Explanation: Von mises stresses are required to be calculated or reported for while tackling or encountering problems involving ductile materials. Ductility is the ability of a material by which it can deform under tensile stress.

5. What type of stresses should be calculated when tackling with brittle materials?

a) Minimum shear stress

b) Maximum principal stress

c) Maximum torsional stress

d) Maximum bending stress

View Answer

Explanation: Maximum principal stresses are required to be calculated or reported for while tackling or encountering problems involving brittle materials. Brittle nature is the ability of a material by which it can deform under compression stress.

6. Which of the following defines true stress?

a) Ratio of applied load to instantaneous cross sectional area

b) Ratio of applied load to continuous cross sectional area

c) Ratio of expected load to instantaneous cross sectional area

d) Ratio of expected load to continuous cross sectional area

View Answer

Explanation: True stress is defined as the ratio of applied load to instantaneous cross sectional area. Instantaneous cross sectional area corresponds to the instantaneous change in gauge length of the material under stress application.

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