MCQOPTIONS
Saved Bookmarks
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 coordinates are not used in CFD? |
| A. | Orthogonal coordinates |
| B. | Cartesian coordinates |
| C. | Spherical coordinates |
| D. | Number line |
| Answer» E. | |
| 2. |
While using a Finite Element Method, one has to approximate ____________ |
| A. | boundary conditions |
| B. | integrals at grid faces |
| C. | derivatives at grid points |
| D. | shape functions and weighting functions |
| Answer» E. | |
| 3. |
Which of these grids are called Chimera grids? |
| A. | Structured grids with overlapping blocks |
| B. | Block-structured grids |
| C. | Block-structured grids with overlapping blocks |
| D. | Structured grids |
| Answer» D. Structured grids | |
| 4. |
Which of these features of structured grids is a disadvantage? |
| A. | Easy to solve |
| B. | Suitable for simple geometries |
| C. | Efficient in memory requirements |
| D. | Less time requirement |
| Answer» C. Efficient in memory requirements | |
| 5. |
Each node has 4 nearest neighbours. This statement is correct for which of these grid types? |
| A. | Structured 2-D grids |
| B. | Unstructured 2-D grids |
| C. | Structured 3-D grids |
| D. | Unstructured 3-D grids |
| Answer» B. Unstructured 2-D grids | |
| 6. |
Express the 2-dimensional continuity equation in cylindrical coordinates.a) \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\frac{\rho v_r}{r}=0\) b) \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\rho \frac{v_r}{r}+\frac{\partial\rho}{\partial t}=0 \) c) \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\frac{\partial\rho}{\partial t}=0\) d) \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\thet |
| A. | \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\frac{\rho v_r}{r}=0\) |
| B. | \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\rho \frac{v_r}{r}+\frac{\partial\rho}{\partial t}=0 \) |
| C. | \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\frac{\partial\rho}{\partial t}=0\) |
| D. | \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\rho \frac{v_r}{r}+\frac{\partial\rho}{\partial t}=0\) |
| Answer» C. \(\frac{\partial(\rho v_r)}{\partial r}+\frac{1}{r}\frac{\partial(\rho v_\theta)}{\partial\theta}+\frac{\partial\rho}{\partial t}=0\) | |
| 7. |
The mathematical model is based on ____________ |
| A. | physical principles and assumptions |
| B. | physical principles |
| C. | flow model |
| D. | flow model and assumptions |
| Answer» B. physical principles | |
| 8. |
Choosing a particular type of discretization method is ineffective when ___________ |
| A. | mathematical model is complex |
| B. | mathematical model is simple |
| C. | grid is coarse |
| D. | grid is very fine |
| Answer» E. | |
| 9. |
What does the mathematical model of a fluid flow contain? |
| A. | Partial differential equations |
| B. | Discretized partial differential equations |
| C. | Partial differential equations and boundary conditions |
| D. | Discretized partial differential equations and boundary conditions |
| Answer» D. Discretized partial differential equations and boundary conditions | |
| 10. |
Which is the first step in the numerical solution of a fluid flow problem? |
| A. | Discretization |
| B. | Physical model of the flow |
| C. | Mathematical model of the flow |
| D. | Iteration |
| Answer» D. Iteration | |