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 of these properties of the SIMPLE scheme matches with the energy equation of the compressible flows? |
| A. | Instability |
| B. | Overshoots |
| C. | Extra equation |
| D. | Under-relaxation term |
| Answer» D. Under-relaxation term | |
| 2. |
An extra term in the energy equation of the compressible flows is ___________ |
| A. | convection term |
| B. | viscous dissipation term |
| C. | diffusion term |
| D. | unsteady term |
| Answer» C. diffusion term | |
| 3. |
In the mass flow rate correction term at low Mach numbers, which of these terms dominate? |
| A. | The density correction |
| B. | The gradient of density correction |
| C. | The pressure correction |
| D. | The gradient of pressure correction |
| Answer» E. | |
| 4. |
The pressure-correction equation of the compressible flows is ___________ |
| A. | a hyperbolic equation |
| B. | an elliptic equation |
| C. | a combined elliptic and hyperbolic equation |
| D. | a parabolic equation |
| Answer» B. an elliptic equation | |
| 5. |
The extra term in the pressure-correction equation of the compressible flows ___________ |
| A. | density-correction field |
| B. | pressure-correction field |
| C. | velocity-correction field |
| D. | viscosity-correction field |
| Answer» B. pressure-correction field | |
| 6. |
The bulk viscosity term in the compressible flows are discretized as ___________ |
| A. | summation of bulk viscosity and area at the faces |
| B. | product of bulk viscosity and volume at the cell centre |
| C. | product of bulk viscosity and area at the faces |
| D. | summation of fluxes over the faces |
| Answer» E. | |
| 7. |
Which of these methods is used in the compressible flows to find the densities at the faces? |
| A. | Central difference |
| B. | Upwind difference |
| C. | Rhie-chow interpolation |
| D. | Weighted average |
| Answer» C. Rhie-chow interpolation | |
| 8. |
Which of these terms is newly interpolated for the compressible flows? |
| A. | Temperature |
| B. | Density |
| C. | Pressure |
| D. | Mass |
| Answer» C. Pressure | |
| 9. |
Which of these differences occur in the momentum equation of the compressible flows when compared to that of the incompressible flows? |
| A. | Temperature term |
| B. | Source term |
| C. | Bulk viscosity |
| D. | Bulk modulus |
| Answer» D. Bulk modulus | |
| 10. |
Which of these equations are needed for compressible flows? |
| A. | Mass, momentum and energy conservations and equation of state |
| B. | Mass and momentum conservations and equation of state |
| C. | Momentum and energy conservations and equation of state |
| D. | Mass, momentum and energy conservations |
| Answer» B. Mass and momentum conservations and equation of state | |