MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
What is the range of y+ in the log-law layer? |
| A. | 30<y+<500 |
| B. | 20<y+<500 |
| C. | 30<y+<400 |
| D. | 20<y+<400 |
| Answer» B. 20<y+<500 | |
| 2. |
What is the other name of the velocity-defect law? |
| A. | Linear law |
| B. | Log law |
| C. | Law of the wall |
| D. | Law of the wake |
| Answer» E. | |
| 3. |
The layer with viscous and turbulent stresses in equal magnitude is called _____________ |
| A. | Viscous sub-layer |
| B. | Log-law layer |
| C. | Buffer layer |
| D. | Velocity-defect layer |
| Answer» D. Velocity-defect layer | |
| 4. |
What is the range of y+ in the viscous sub-layer? |
| A. | 0<y+<20 |
| B. | 0<y+<5 |
| C. | 0<y+<10 |
| D. | 0<y+<15 |
| Answer» C. 0<y+<10 | |
| 5. |
The fluid layer which is in contact with a smooth wall is called ____________ |
| A. | Inviscid layer |
| B. | Linear sub-layer |
| C. | Log-law layer |
| D. | Wake-law layer |
| Answer» C. Log-law layer | |
| 6. |
The velocity at a point far away from the wall is defined by ____________ |
| A. | Power law |
| B. | Log-law |
| C. | Velocity-defect law |
| D. | Newton’s law of viscosity |
| Answer» D. Newton’s law of viscosity | |
| 7. |
What is u+? |
| A. | The ratio of velocity parallel to the wall to the friction velocity |
| B. | The ratio of the friction velocity to velocity parallel to the wall |
| C. | The ratio of free-stream velocity and friction velocity |
| D. | The ratio of friction velocity and free-stream velocity |
| Answer» B. The ratio of the friction velocity to velocity parallel to the wall | |
| 8. |
Which of these laws define the dimensionless quantities u+ and y+? |
| A. | Velocity-defect law |
| B. | Log-law |
| C. | Newton’s law of viscosity |
| D. | Law of the wall |
| Answer» E. | |
| 9. |
For flows over a flat plate, at length scales near to the length of the flat plate, which of these is correct? |
| A. | Inertial force is zero |
| B. | Inertial force is large |
| C. | Inertial force is equal to viscous force |
| D. | Viscous force is large |
| Answer» C. Inertial force is equal to viscous force | |