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. |
Spatial averaging is suitable for ____________ |
| A. | homogeneous turbulent flows |
| B. | unsteady turbulent flows |
| C. | turbulent boundary layer flows |
| D. | mixing flows |
| Answer» B. unsteady turbulent flows | |
| 2. |
Which of these represent ensemble averaging if ‘N’ represents the number of identical quantities? |
| A. | \(\frac{1}{N}\int_N \phi dN\) |
| B. | \(lim_{N→∞}\frac{1}{N}\int_N \phi dN\) |
| C. | \(\frac{1}{N}\sum_{i=1}^N\phi_i \) |
| D. | \(lim_{N→∞}\frac{1}{N} \sum_{i=1}^N\phi_i \) |
| Answer» E. | |
| 3. |
Ensemble averaging represents the average of ____________ |
| A. | unsteady quantities |
| B. | steady quantities |
| C. | identical quantities |
| D. | mean quantities |
| Answer» D. mean quantities | |
| 4. |
Which of these represent spatial averaging? |
| A. | \(\frac{1}{V}\sum\phi\) |
| B. | \(lim_{V→∞}\frac{1}{V}\int_V \phi dV\) |
| C. | \(\frac{1}{T}\int_T \phi dT\) |
| D. | \(\frac{1}{N}\int_N \phi dN\) |
| Answer» C. \(\frac{1}{T}\int_T \phi dT\) | |
| 5. |
Time averaging method is useful for ____________ |
| A. | unsteady turbulent flows |
| B. | steady turbulent flows |
| C. | turbulent boundary layer flows |
| D. | mixing flows |
| Answer» C. turbulent boundary layer flows | |
| 6. |
The governing equations which are averaged using these methods of averaging are used in _____________ |
| A. | DNS model |
| B. | SST model |
| C. | RANS model |
| D. | k-ε model |
| Answer» D. k-ε model | |
| 7. |
Which of these represent time averaging? |
| A. | \(\frac{1}{V}\int_V \phi dV\) |
| B. | \(lim_{V→∞}\frac{1}{V}\int_V \phi dV\) |
| C. | \(\frac{1}{T}\int_t^{t+T}\phi dt\) |
| D. | \(lim_{T→∞}\frac{1}{T}\int_t^{t+T}\phi dt\) |
| Answer» E. | |
| 8. |
Which of these averaging methods is useful for any kind of turbulent flows? |
| A. | Ensemble averaging |
| B. | Time averaging |
| C. | Volume averaging |
| D. | Spatial averaging |
| Answer» B. Time averaging | |
| 9. |
What are the methods of averaging used to? |
| A. | To decompose the flow variable |
| B. | To get the mean component of the flow variable |
| C. | To get the remove the fluctuating component |
| D. | To solve the flow variables |
| Answer» C. To get the remove the fluctuating component | |
| 10. |
The methods of averaging are collectively called as ______________ |
| A. | Reynolds averaging |
| B. | Boussinesq averaging |
| C. | Kolmogorov averaging |
| D. | Schmidt averaging |
| Answer» B. Boussinesq averaging | |