MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
It is difficult to analyse the stability of _________ |
| A. | non-linear systems without boundary conditions |
| B. | linear systems with boundary conditions |
| C. | non-linear systems with boundary conditions |
| D. | linear systems without boundary conditions |
| Answer» D. linear systems without boundary conditions | |
| 2. |
What is the Scarborough criterion? |
| A. | The coefficient matrix has larger values in the main diagonal |
| B. | The coefficient matrix has larger values above the main diagonal |
| C. | The coefficient matrix has larger values below the main diagonal |
| D. | The coefficient matrix has larger values except the main diagonal |
| Answer» B. The coefficient matrix has larger values above the main diagonal | |
| 3. |
Which of the following is a sufficient condition for a system to be stable? |
| A. | Gauss criterion |
| B. | Convergence criterion |
| C. | Stopping criterion |
| D. | Scarborough criterion |
| Answer» E. | |
| 4. |
Stability of explicit transient schemes is related to _________ |
| A. | over-relaxation |
| B. | the time-step |
| C. | the grid size |
| D. | under-relaxation |
| Answer» C. the grid size | |
| 5. |
A system is said to be stable if _________ |
| A. | the results for different boundary and initial conditions are different |
| B. | the results for different boundary and initial conditions are the same |
| C. | the system can be solved for different initial and boundary conditions |
| D. | the result of two consequent iterations are the same |
| Answer» D. the result of two consequent iterations are the same | |
| 6. |
For which of these problems, the error will be bounded if the system is stable? |
| A. | Transient problems |
| B. | Subsonic problems |
| C. | Supersonic problems |
| D. | Inviscid problems |
| Answer» B. Subsonic problems | |
| 7. |
Stability is the property of a _________ |
| A. | partial differential equation |
| B. | discretized equation |
| C. | discretization process |
| D. | mathematical model |
| Answer» C. discretization process | |
| 8. |
Which of these is used to analyse the stability of a system? |
| A. | Nusselt number |
| B. | Courant number |
| C. | Peclet number |
| D. | Von Neumann s method |
| Answer» E. | |
| 9. |
Stability is defined _________ |
| A. | only for iterative solvers |
| B. | only for direct solvers |
| C. | for all numerical solvers |
| D. | for all discretization processes |
| Answer» B. only for direct solvers | |