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 is true for a symmetry boundary? |
| A. | Diffusive flux is non-zero |
| B. | Diffusive flux is zero |
| C. | Convective flux is zero |
| D. | Convective flux is non-zero |
| Answer» D. Convective flux is non-zero | |
| 2. |
A symmetry boundary is treated the same as a wall boundary for this reason. |
| A. | There is flow across this boundary |
| B. | No convection flux across this boundary |
| C. | There is convection flux across this boundary |
| D. | No flow across this boundary |
| Answer» E. | |
| 3. |
For a symmetry boundary, which is correct? |
| A. | V<sub>n</sub> 0, <sub>nn</sub>=0 |
| B. | V<sub>n</sub> 0, <sub>nn</sub> 0 |
| C. | V<sub>n</sub>=0, <sub>nn</sub> 0 |
| D. | V<sub>n</sub>=0, <sub>nn</sub>=0 |
| Answer» D. V<sub>n</sub>=0, <sub>nn</sub>=0 | |
| 4. |
Which of the following applies to a symmetry boundary? |
| A. | There is no flow and no scalar flux across the boundary |
| B. | There are flow and scalar fluxes across the boundary |
| C. | There is no scalar flux but flow is possible across the boundary |
| D. | There is no flow but scalar flux is possible across the boundary |
| Answer» B. There are flow and scalar fluxes across the boundary | |
| 5. |
What is the shear force of a fluid (velocity ( vec{u} )) near the wall for a moving wall (velocity ( ( overrightarrow{u_{wall}} )))? |
| A. | ( vec{F}=- mu frac{ vec{u}}{ Delta y} times area ) |
| B. | ( vec{F}=- mu frac{ vec{u}- overrightarrow{u_{wall}}}{ Delta y} times area ) |
| C. | ( vec{F}=- mu frac{ vec{u}- overrightarrow{u_{wall}}}{ Delta y} ) |
| D. | ( vec{F}=- mu frac{ vec{u}}{ Delta y} ) |
| Answer» C. ( vec{F}=- mu frac{ vec{u}- overrightarrow{u_{wall}}}{ Delta y} ) | |
| 6. |
For no-slip condition, which of these is true regarding the pressure correction equation if the wall is at the bottom? |
| A. | a<sub>n</sub>=0 |
| B. | a<sub>w</sub>=0 |
| C. | a<sub>e</sub>=0 |
| D. | a<sub>s</sub>=0 |
| Answer» E. | |
| 7. |
For inviscid flows, which is correct immediately near the wall? |
| A. | ( vec{V} 0 ) |
| B. | ( vec{V} = 0 ) |
| C. | ( vec{V} > 0 ) |
| D. | ( vec{V} lt 0 ) |
| Answer» B. ( vec{V} = 0 ) | |
| 8. |
Which of these is true for an impermeable wall? |
| A. | ( vec{V}=0 ) above the surface |
| B. | ( vec{V}=0 ) at the surface |
| C. | ( vec{V}. vec{n}=0 ) at the surface |
| D. | ( vec{V}. vec{n}=0 ) above the surface |
| Answer» D. ( vec{V}. vec{n}=0 ) above the surface | |
| 9. |
Which of these represents the temperature of the fluid layer immediately near the wall at a condition analogous to no-slip? Note: Tw is the temperature at the wall. |
| A. | T=-1 |
| B. | T=1 |
| C. | T=T<sub>w</sub> |
| D. | T=0 |
| Answer» D. T=0 | |
| 10. |
For a no-slip condition which of these about velocity components is true near the wall boundary? |
| A. | u=1, v=0, w=0 |
| B. | u=0, v=0, w=0 |
| C. | u=0, v=1, w=0 |
| D. | u=0, v=0, w=1 |
| Answer» C. u=0, v=1, w=0 | |