In Finite Element Method (FEM), choose the incorrect option regarding to the dimensions (mm) of elements in a finite element mesh?

In Finite Element Method (FEM), which option is not correct with respect to discretization or mesh generation?

A

Density of elements depends on the degree of accuracy desired

B

Choice of element type may depend on the geometry of domain

C

For better accuracy correct formulae has to be applied

D

Some general rules govern mesh generation

In Finite Element Method (FEM), Mesh convergence is a measure of the number of _____ required in a model to ensure that the results of an analysis are not affected by changing the size of the _____

A

elements, mesh

B

nodes, mesh

C

nodes, element

D

degrees of freedom, element

In Finite Element Method (FEM), for discretization purpose in general, a refined mesh is employed in areas where changes in geometry, boundary conditions, loading, material properties or solution are present.

A

True

B

False

In Finite Element Method (FEM), for discretization purpose in general, which optionis not true for mesh refinement?

A

Previous meshes should be contained in the refined mesh

B

Any point in the body can be included within an arbitrarily small element at any stage of the mesh refinement

C

The same order of approximation for the solution may be preserved through all stages of the refinement process

D

Elements with very large aspect ratios are desired

For a finite element mesh to be valid, which option is not true regarding the elements used?

A

The number of elements used is not exact

B

Elements can be of different orders

C

Elements can be of different types

D

The choice of elements and mesh is problem-independent

In the Finite Element Method (FEM), if the geometry is represented by elements of a higher order than those used to approximate the field displacement variables, then it is called super-parametric formulation.

A

True

B

False

I1 is the current flowing in the first mesh. I2 is the current flowing in the second mesh and I3 is the current flowing in the top mesh. If all three currents are flowing in the clockwise direction, find the value of I1, I2 and I3.

A

7.67A, 10.67A, 2A

B

10.67A, 7.67A, 2A

C

7.67A, 8.67A, 2A

D

3.67A, 6.67A, 2A

Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for

A

British standard screens

B

German standard screens (DIN 1171) etc

C

American standard screens (ASTM and Tyler standard screens)

D

All of the above

A finite element mesh is refined by subdividing existing elements into two or more elements of the same type, what is the name of such a refinement?

A

h-version mesh refinement

B

p-version mesh refinement

C

h, p-version mesh refinement

D

p, h-version mesh refinement

In Finite Element Method (FEM), for discretization purpose in general, which 2D element is an undesired one?

A

An equilateral triangle of side 5 units

B

A quadrilateral

C

A rhombus of side 10 units

D

A rectangle of dimensions 100×1

In Finite Element Method (FEM), choose the incorrect option regarding to the dimensions (mm) of elements in a finite element mesh?

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