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. |
To overcome the performance issues of the PISO algorithm, which of these methods is used? |
| A. | Time-steps based on temporal schemes are used |
| B. | Large time-steps are used |
| C. | First-order temporal differencing is used |
| D. | Higher-order temporal differencing is used |
| Answer» E. | |
| 2. |
Which of these is a disadvantage of the PISO algorithm? |
| A. | memory required |
| B. | small time-steps |
| C. | computational cost |
| D. | time required |
| Answer» C. computational cost | |
| 3. |
The order of temporal accuracy achieved by the PISO algorithm for pressure and momentum are ___________ and ___________ respectively. |
| A. | four, three |
| B. | two, three |
| C. | three, four |
| D. | four, two |
| Answer» D. four, two | |
| 4. |
Which of these equations are altered by the transient term in the PISO algorithm? |
| A. | both the first and second pressure-correction equations |
| B. | only the first pressure-correction equation |
| C. | only the second pressure-correction equation |
| D. | neither the first nor the second pressure-correction equations |
| Answer» B. only the first pressure-correction equation | |
| 5. |
Which of these terms is added to the source term of the momentum equations of the transient PISO algorithm? |
| A. | product of the latest central coefficient and latest velocity |
| B. | product of the current central coefficient and previous velocity |
| C. | product of the previous central coefficient and previous velocity |
| D. | product of the initial central coefficient and current velocity |
| Answer» D. product of the initial central coefficient and current velocity | |
| 6. |
Which of these terms of the momentum equations are altered by the transient term in the PISO algorithm? |
| A. | neighbouring coefficients |
| B. | central coefficients |
| C. | weighted average of the neighbouring coefficients |
| D. | velocity correction term |
| Answer» C. weighted average of the neighbouring coefficients | |
| 7. |
Which of these techniques is used by the PISO algorithm? |
| A. | Neighbour splitting |
| B. | Source splitting |
| C. | Coefficient splitting |
| D. | Operator splitting |
| Answer» E. | |
| 8. |
The PISO algorithm for the transient problem is _________ |
| A. | iterative |
| B. | non-iterative |
| C. | never converging |
| D. | fast converging |
| Answer» C. never converging | |
| 9. |
Which of these statements is correct about the transient SIMPLE algorithm? |
| A. | No additional terms are needed in the continuity and pressure-correction equations |
| B. | No additional terms are needed in the continuity equation |
| C. | An additional term is needed in the continuity and pressure-correction equations |
| D. | No additional terms are needed in the pressure-correction equation |
| Answer» D. No additional terms are needed in the pressure-correction equation | |
| 10. |
The SIMPLE algorithm used for transient problems is __________ |
| A. | implicit and iterative |
| B. | implicit and direct |
| C. | explicit and iterative |
| D. | explicit and direct |
| Answer» B. implicit and direct | |