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 is correct for the implicit method of solving pressure in the compressible flows? |
| A. | The Poisson equation alone is solved |
| B. | The Poisson equation and the momentum equation are solved simultaneously |
| C. | The momentum equation is solved first |
| D. | The Poisson equation is solved first |
| Answer» C. The momentum equation is solved first | |
| 2. |
The explicit method is preferred when __________ |
| A. | an accurate velocity field is needed |
| B. | the pressure value is needed |
| C. | an accurate time history of the flow is needed |
| D. | only less memory is available |
| Answer» D. only less memory is available | |
| 3. |
According to the explicit time-advanced method for getting pressure, which of these is correct? |
| A. | Continuity is enforced at the previous step after starting to solve the current step |
| B. | Momentum conservation is enforced at the previous step after starting to solve the current step |
| C. | Momentum equation is enforced at each step before moving to the next step |
| D. | Continuity is enforced before at each step moving to the next step |
| Answer» E. | |
| 4. |
The pressure equation in the incompressible flows contain _________ |
| A. | Taylor series terms |
| B. | Hermitian operator |
| C. | Laplacian operator |
| D. | Fourier series terms |
| Answer» D. Fourier series terms | |
| 5. |
Which of these terms in the pressure equation become zero? |
| A. | Viscous and pressure terms |
| B. | Viscous and transient terms |
| C. | Pressure and source terms |
| D. | Source and transient terms |
| Answer» C. Pressure and source terms | |
| 6. |
The pressure equation for the incompressible equation is _________ |
| A. | Eulerian equation |
| B. | Divergence equation |
| C. | Lagrangian equation |
| D. | Poisson equation |
| Answer» E. | |
| 7. |
Which of these equations are used to get the pressure values in the incompressible flows? |
| A. | Continuity and momentum equations |
| B. | Momentum and energy equations |
| C. | Energy equation and equation of state |
| D. | Equation of state and continuity equations |
| Answer» B. Momentum and energy equations | |
| 8. |
How is pressure calculated in a compressible flow? |
| A. | Pressure correction equation |
| B. | Equation of state |
| C. | Momentum equation |
| D. | Energy equation |
| Answer» C. Momentum equation | |
| 9. |
Which of these statements is true for an incompressible flow? |
| A. | Absolute mass flux is not important |
| B. | Absolute density is not important |
| C. | Absolute temperature is not important |
| D. | Absolute pressure is not important |
| Answer» E. | |
| 10. |
Which of these is a disadvantage of the Navier-Stokes equations? |
| A. | No independent-equation for pressure |
| B. | No independent-equation for temperature |
| C. | No equation to find the density |
| D. | No equation to find the velocity |
| Answer» B. No independent-equation for temperature | |