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 equal to the velocity-scale ratio? |
| A. | Re<sup>-3/4</sup> |
| B. | Re<sup>-1/3</sup> |
| C. | Re<sup>-1/4</sup> |
| D. | Re<sup>-2/4</sup> |
| Answer» C. Re<sup>-1/4</sup> | |
| 2. |
When the Reynolds number increases, the difference between the large and small scales ____________ |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | cannot be defined |
| Answer» B. decreases | |
| 3. |
The behaviour of large eddies depend on __________ |
| A. | Viscosity and time scales |
| B. | Velocity and time scales |
| C. | Time and length scales |
| D. | Velocity and length scales |
| Answer» E. | |
| 4. |
To establish the relationship between turbulent scales and the Reynolds number, which of these methods is used? |
| A. | Statistical averaging |
| B. | Dimensional analysis |
| C. | Weighted averaging |
| D. | Geometric algebra |
| Answer» C. Weighted averaging | |
| 5. |
Express the time-scale ratio in terms of Reynolds number (Re). |
| A. | Re<sup>-1/4</sup> |
| B. | Re<sup>3/4</sup> |
| C. | Re<sup>-1/2</sup> |
| D. | Re<sup>1/2</sup> |
| Answer» D. Re<sup>1/2</sup> | |
| 6. |
The Reynolds number associated with the smallest scale of motion in the turbulent flow is ____________ |
| A. | 0.1 |
| B. | 1 |
| C. | 10 |
| D. | 100 |
| Answer» B. 1 | |
| 7. |
Small-scale eddy motions have ___________ |
| A. | does not vary from the energy losses of the large-scale eddy motions |
| B. | the same order of energy losses as the large-scale eddy motions |
| C. | decreased energy losses |
| D. | increased energy losses |
| Answer» E. | |
| 8. |
What is the relationship between Length-scale ratio and Reynolds number (Re)? |
| A. | Re<sup>3/4</sup> |
| B. | Re<sup>-3/4</sup> |
| C. | Re<sup>1/2</sup> |
| D. | Re<sup>-1/2</sup> |
| Answer» C. Re<sup>1/2</sup> | |
| 9. |
What do the length, velocity and time-scale ratios mean? |
| A. | The ratio of large-scale and characteristic properties |
| B. | The ratio of small-scale and characteristic properties |
| C. | The ratio of small and large scale eddies |
| D. | The ratio of actual and characteristic properties |
| Answer» D. The ratio of actual and characteristic properties | |
| 10. |
Small eddy scales are called as ___________ |
| A. | Batchelor scales |
| B. | Taylor micro-scales |
| C. | Kolmogorov micro-scales |
| D. | Integral length scales |
| Answer» D. Integral length scales | |