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. |
Reynolds number gives the relative importance of __________ |
| A. | viscous force and tangential force |
| B. | inertia force and viscous force |
| C. | inertia force and pressure force |
| D. | pressure force and viscous force |
| Answer» C. inertia force and pressure force | |
| 2. |
Transfer of kinetic energy from large eddies to smaller eddies is called as _________ |
| A. | Energy cascade |
| B. | Momentum cascade |
| C. | Energy decomposition |
| D. | Momentum decomposition |
| Answer» B. Momentum cascade | |
| 3. |
Large eddies are _________ |
| A. | two-dimensional and isotropic |
| B. | two-dimensional and isotropic |
| C. | three-dimensional and anisotropic |
| D. | two-dimensional and anisotropic |
| Answer» D. two-dimensional and anisotropic | |
| 4. |
Which of these is highly energetic? |
| A. | Kolmogorov micro-scale eddies |
| B. | Small eddies |
| C. | Medium eddies |
| D. | Large eddies |
| Answer» E. | |
| 5. |
Which of these is correct for large eddies? |
| A. | High viscosity and linear momentum are conserved |
| B. | Low viscosity and linear momentum are conserved |
| C. | High viscosity and angular momentum are conserved |
| D. | Low viscosity and angular momentum are conserved |
| Answer» E. | |
| 6. |
Large turbulent eddies extract energy from the mean flow by this process. |
| A. | Energy decomposition |
| B. | Eddy extracting |
| C. | Vortex stretching |
| D. | Substantial variation |
| Answer» D. Substantial variation | |
| 7. |
Eddies in turbulent flows result in _________ |
| A. | high diffusion coefficients |
| B. | less diffusion coefficients |
| C. | high value of the source term |
| D. | low value of the source term |
| Answer» B. less diffusion coefficients | |
| 8. |
Represent the velocity of turbulent flow using Reynolds decomposition. |
| A. | Steady velocity + Mean velocity |
| B. | Steady velocity + Fluctuating component of velocity |
| C. | Variation in velocity + Fluctuating component of velocity |
| D. | Mean variation + Fluctuating component of velocity |
| Answer» C. Variation in velocity + Fluctuating component of velocity | |
| 9. |
The mathematical technique used to represent the random nature of the turbulent flow. |
| A. | RANS |
| B. | Reynolds decomposition |
| C. | Parallel decomposition |
| D. | DNS |
| Answer» C. Parallel decomposition | |
| 10. |
What is Reynolds stress? |
| A. | Stress due to velocity fluctuations |
| B. | Tangential component of pressure |
| C. | Stress due to pressure fluctuations |
| D. | Normal component of viscosity |
| Answer» B. Tangential component of pressure | |