MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
The central differencing scheme gives good results when _____________ |
| A. | the grid is coarse |
| B. | the grid is very fine |
| C. | the grid is Cartesian and uniform |
| D. | the gird is on-Cartesian |
| Answer» C. the grid is Cartesian and uniform | |
| 2. |
The order of accuracy of the central differencing scheme is _____________ |
| A. | fourth-order |
| B. | third-order |
| C. | second-order |
| D. | first-order |
| Answer» D. first-order | |
| 3. |
The central difference scheme gives unphysical results when the problem is _____________ |
| A. | depends on the boundary conditions |
| B. | equally dominated by diffusion and convection |
| C. | diffusive dominant |
| D. | convective dominant |
| Answer» E. | |
| 4. |
The central differencing scheme becomes inconsistent when the Peclet number _____________ |
| A. | is higher than 2 |
| B. | is less than 2 |
| C. | is higher than 5 |
| D. | is less than 5 |
| Answer» B. is less than 2 | |
| 5. |
Which of these is correct about the central differencing scheme? |
| A. | The importance of upwind and downwind nodes depends on the problem |
| B. | It gives more importance to the downwind nodes |
| C. | It gives equal importance to upwind and downwind nodes |
| D. | It gives more importance to the upwind nodes |
| Answer» D. It gives more importance to the upwind nodes | |
| 6. |
The central difference approximation goes wrong when _____________ |
| A. | Peclet number is negative |
| B. | Peclet number is positive |
| C. | Peclet number is low |
| D. | Peclet number is high |
| Answer» E. | |
| 7. |
What is the relationship between ( frac{ phi_c- phi_w}{ phi_E- phi_w} ) and the Peclet number (Pe) when the grid is uniform? |
| A. | ( frac{ phi_c- phi_w}{ phi_E- phi_w} = frac{1}{2}(1- frac{Pe}{2}) ) |
| B. | ( frac{ phi_c- phi_w}{ phi_E- phi_w} = frac{1}{2}(1+ frac{Pe}{2}) ) |
| C. | ( frac{ phi_c- phi_w}{ phi_E- phi_w} = frac{1}{2}( frac{Pe}{2}-1) ) |
| D. | ( frac{ phi_c- phi_w}{ phi_E- phi_w} = ( frac{Pe}{4}) ) |
| Answer» B. ( frac{ phi_c- phi_w}{ phi_E- phi_w} = frac{1}{2}(1+ frac{Pe}{2}) ) | |
| 8. |
What is the central differencing scheme similar to? |
| A. | Interpolation profile |
| B. | Linear interpolation profile |
| C. | Weighted average method |
| D. | Geometric mean |
| Answer» C. Weighted average method | |