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. |
Which of these is the opposite step of restriction? |
| A. | Prolongation |
| B. | Traversal |
| C. | Agglomeration |
| D. | Coarsening |
| Answer» B. Traversal | |
| 2. |
Errors are transferred from a fine grid to a coarser one. Similarly __________ is transferred from a coarse grid to a finer one. |
| A. | residual |
| B. | correction |
| C. | restriction |
| D. | prolongation |
| Answer» C. restriction | |
| 3. |
Which of these traversal cycles are possible for an algebraic multi-grid approach? |
| A. | W-cycle |
| B. | V-cycle |
| C. | U-cycle |
| D. | F-cycle |
| Answer» D. F-cycle | |
| 4. |
For an algebraic multi-grid approach, the residual in the kth level is __________ |
| A. | residual in the (k+1)<sup>th</sup> level |
| B. | summation of the residuals in the (k)<sup>th</sup> level |
| C. | residual in the (k-1)<sup>th</sup> level |
| D. | summation of the residuals in the (k-1)<sup>th</sup> level |
| Answer» E. | |
| 5. |
Let rk be the residual in the kth level of multi-grid approach. Which of these give the restriction operator? |
| A. | ( frac{r^{k+1}}{r^k} ) |
| B. | ( frac{r^k}{r^{k+1}} ) |
| C. | r<sup>k+1</sup>-r<sup>k</sup> |
| D. | r<sup>k</sup>-r<sup>k+1</sup> |
| Answer» B. ( frac{r^k}{r^{k+1}} ) | |
| 6. |
The multi-grid approach is a ___________ process. |
| A. | direct |
| B. | iterative |
| C. | cyclic |
| D. | periodic |
| Answer» D. periodic | |
| 7. |
Multi-grid approach switches between ___________ and ____________ grids to meet the errors. |
| A. | structured and unstructured |
| B. | collocated and staggered |
| C. | cylindrical to polar |
| D. | fine and coarse |
| Answer» E. | |
| 8. |
Which of these errors need a multi-grid approach? |
| A. | Low amplitude error |
| B. | High amplitude error |
| C. | Low frequency error |
| D. | High frequency error |
| Answer» D. High frequency error | |
| 9. |
Which of these properties are affected when the multi-grid approach is not used? |
| A. | Conservativeness |
| B. | Convergence |
| C. | Consistency |
| D. | Stability |
| Answer» C. Consistency | |
| 10. |
The multi-grid approach is used to assist __________ |
| A. | iterative solvers |
| B. | direct solvers |
| C. | gradient solvers |
| D. | pre-conditioned solvers |
| Answer» B. direct solvers | |