MCQOPTIONS
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MCQOPTIONS
This section includes 8 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 type of grids is the best for flow over an airfoil? |
| A. | Stretched grids |
| B. | Adaptive grids |
| C. | Boundary-fitted grids |
| D. | Elliptic grids |
| Answer» D. Elliptic grids | |
| 2. |
What are zonal grids? |
| A. | Grids generated for a particular zone of the domain of interest |
| B. | Grids varying at different zones |
| C. | Grids generated for a particular time in the flow |
| D. | Grids varying with time |
| Answer» B. Grids varying at different zones | |
| 3. |
What does elliptic grid generation mean? |
| A. | Grids generated for elliptic equations |
| B. | Grids transformed with elliptic equations |
| C. | The computational domain is elliptic |
| D. | The object under consideration is elliptic |
| Answer» C. The computational domain is elliptic | |
| 4. |
Which of these properties are balanced by using adaptive grids? |
| A. | Accuracy and convergence |
| B. | Efficiency and stability |
| C. | Accuracy and stability |
| D. | Accuracy and efficiency |
| Answer» E. | |
| 5. |
Let x, y be the coordinates in the physical domain and , be the coordinates in the computational domain. Which of these is correct for adaptive grids? |
| A. | ( frac{ partial xi}{ partial x} 1 ) |
| B. | ( frac{ partial xi}{ partial x} 0 ) |
| C. | ( frac{ partial xi}{ partial t} 0 ) |
| D. | ( frac{ partial xi}{ partial t} 1 ) |
| Answer» D. ( frac{ partial xi}{ partial t} 1 ) | |
| 6. |
Adaptive grids change automatically based on ______________ |
| A. | flow field gradients |
| B. | time rate of change of the flow properties |
| C. | grid gradients |
| D. | time rate of change of the grid points |
| Answer» B. time rate of change of the flow properties | |
| 7. |
Let x, y be the coordinates in the physical domain and , be the coordinates in the computational domain. In which of these cases, the horizontal lines are stretched and the vertical lines are equally spaced? |
| A. | =x; =ln u2061(y+1) |
| B. | =ln u2061(x+1); =y |
| C. | =x; =y |
| D. | =ln u2061(x+1); =ln u2061(y+1) |
| Answer» B. =ln u2061(x+1); =y | |
| 8. |
Which of these analyses needs a stretched grid? |
| A. | Transient flow over a flat plate |
| B. | Incompressible flow over a flat plate |
| C. | Viscous flow over a flat plate |
| D. | Subsonic flow over a flat plate |
| Answer» D. Subsonic flow over a flat plate | |