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. |
Gradient for an unstructured grid is calculated by ___________ |
| A. | looping over the nodes in the computational domain |
| B. | looping over the elements in the computational domain |
| C. | looping over the faces in the computational domain |
| D. | looping over the gradients in the computational domain |
| Answer» D. looping over the gradients in the computational domain | |
| 2. |
When compared to the algorithm to calculate the gradient of a structured grid, the algorithm for unstructured grids ___________ |
| A. | need more computational cost |
| B. | need less computational cost |
| C. | is more accurate |
| D. | is less accurate |
| Answer» C. is more accurate | |
| 3. |
The topology of the faces in an unstructured grid depends upon ___________ |
| A. | Straddling elements |
| B. | Boundary elements |
| C. | Interior elements |
| D. | Neighbouring elements |
| Answer» B. Boundary elements | |
| 4. |
Which of these formulae is correct to find the gradient of the element k ? |
| A. | <sub>k</sub> = ( frac{1}{V_k}( Sigma_{n leftarrow f<k} Phi_n vec{S_n}- Sigma_{n leftarrow f>k} Phi_n vec{S_n}) ) |
| B. | <sub>k</sub> = ( frac{1}{V_k}(- Sigma_{n leftarrow f} Phi_n vec{S_n}) ) |
| C. | <sub>k</sub> = ( frac{1}{V_k}( Sigma_{n leftarrow f} Phi_n vec{S_n}) ) |
| D. | <sub>k</sub> = ( frac{1}{V_k}(- Sigma_{n leftarrow f<k} Phi_n vec{S_n}+ Sigma_{n leftarrow f>k} Phi_n vec{S_n}) ) |
| Answer» E. | |
| 5. |
Which of these is correct for the direction of the normal vectors to faces? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6a.png"><img alt="The direction of the normal vectors to faces - option a" class="alignnone size-full wp-image-251153" height="134" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6a.png" width="141"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6b.png"><img alt="The direction of the normal vectors to faces - option b" class="alignnone size-full wp-image-251154" height="133" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6b.png" width="153"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6c.png"><img alt="The direction of the normal vectors to faces - option c" class="alignnone size-full wp-image-251155" height="134" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6c.png" width="142"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6d.png"><img alt="The direction of the normal vectors to faces - option d" class="alignnone size-full wp-image-251156" height="134" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6d.png" width="146"/></a> |
| Answer» D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6d.png"><img alt="The direction of the normal vectors to faces - option d" class="alignnone size-full wp-image-251156" height="134" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-unstructured-grids-fvm-q6d.png" width="146"/></a> | |
| 6. |
The direction of the normal to a face in an unstructured mesh depends upon __________ |
| A. | Local indices |
| B. | Global indices |
| C. | Direction of flow |
| D. | Direction of increasing indices |
| Answer» C. Direction of flow | |
| 7. |
Which of these entities need the information to be explicitly stored? |
| A. | Elements, faces, nodes and neighbours |
| B. | Elements, faces and nodes |
| C. | Elements, faces and neighbours |
| D. | Elements, nodes and neighbours |
| Answer» B. Elements, faces and nodes | |
| 8. |
What is the cost of flexibility in unstructured grids? |
| A. | Consistency |
| B. | Stability |
| C. | Accuracy |
| D. | Complexity |
| Answer» E. | |
| 9. |
Which of these statements is true for unstructured grids? |
| A. | It is simple to model and use |
| B. | Element connectivity is implicitly defined |
| C. | Element connectivity does not depend upon indices |
| D. | Bounding faces can be easily found |
| Answer» D. Bounding faces can be easily found | |
| 10. |
The advantage of using unstructured grids is ___________ |
| A. | vectorization |
| B. | flexibility |
| C. | simple arrangement |
| D. | less memory requirement |
| Answer» C. simple arrangement | |