MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Computational Fluid Dynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Consider the diagram. When is the formula Φf=gfΦF+(1-gf)Φc; gf=\(\frac{distance_{cf}}{distance_{cf}+distance_{fF}}\) valid? |
| A. | Only if Φ varies linearly |
| B. | Only if Φ varies quadratically |
| C. | Only if Φ varies cubically |
| D. | Always |
| Answer» B. Only if Φ varies quadratically | |
| 2. |
To find the value of a flow variable at a third point in between two points with known values, which of these methods can be used for the one-dimensional case? |
| A. | Shape function |
| B. | Interpolation |
| C. | Taylor series |
| D. | Fourier series |
| Answer» C. Taylor series | |
| 3. |
I know the value of the flow variable at two points. In which of these cases, is it easy for me to calculate the flow variable at a point between these two? |
| A. | Three-dimensional FVM |
| B. | Two-dimensional FVM |
| C. | One-dimensional FVM |
| D. | Two-dimensional FDM |
| Answer» D. Two-dimensional FDM | |
| 4. |
How is it identified whether a vector is pointing outwards or inwards? |
| A. | Sign of the vector joining the element’s centroid with the face’s centroid is used |
| B. | Sign of the surface vector is used |
| C. | Cross product of the surface vector and the vector joining the element’s centroid with the face’s centroid |
| D. | Dot product of the surface vector and the vector joining the element’s centroid with the face’s centroid |
| Answer» E. | |
| 5. |
The surface area of the face of a 3-D element is a _____________ |
| A. | 3-D tensor |
| B. | 2-D tensor |
| C. | Scalar |
| D. | Vector |
| Answer» E. | |
| 6. |
The centroid of the faces of a 3-D element is obtained by _________ |
| A. | Area-weighted average of the sub-elements |
| B. | Average of the sub-elements |
| C. | Area-weighted average of the centroid of the sub-elements |
| D. | Volume-weighted average of the centroid of the sub-elements |
| Answer» D. Volume-weighted average of the centroid of the sub-elements | |
| 7. |
Which of these formulae is used to find the area of the sub-elements in CFD? |
| A. | Vector product of two sides |
| B. | Half of the vector product of two sides |
| C. | Half of the base times height |
| D. | Half of the vector product of all three sides |
| Answer» C. Half of the base times height | |
| 8. |
Which formula is suitable for finding the geometric centre of a polygonal face? |
| A. | \(\frac{1}{No.of points}\sum_{i=1}^{No.of points}\) Point defining the polygoni |
| B. | \(\sum_{i=1}^{No.of\, points}\) Point defining the polygoni |
| C. | \(\frac{1}{Point\, defining\, the\, polygon}\sum_{i=1}^{No.of\, points}\) Point defining the polygoni |
| D. | \(\frac{1}{No.of\, points}\sum_{i=1}^{No.of\, points}\)Centroidi |
| Answer» B. \(\sum_{i=1}^{No.of\, points}\) Point defining the polygoni | |
| 9. |
Which of these points form the apex of the sub-elements of the faces? |
| A. | Centre of mass of the face |
| B. | Vertex of the face |
| C. | Geometric centre of the face |
| D. | Apex of the face |
| Answer» D. Apex of the face | |
| 10. |
How are the faces of a 3-D element divided to find the area? |
| A. | Squares |
| B. | Quadrilaterals |
| C. | Rectangles |
| D. | Triangles |
| Answer» E. | |