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 which of these flows, the Euler equation is applicable? |
| A. | Couette flow |
| B. | Potential flow |
| C. | Stokes Flow |
| D. | Poiseuille’s flow |
| Answer» C. Stokes Flow | |
| 2. |
In Euler form of energy equations, which of these terms is not present? |
| A. | Rate of change of energy |
| B. | Heat radiation |
| C. | Heat source |
| D. | Thermal conductivity |
| Answer» E. | |
| 3. |
Which of the variables in the equation \(\rho\frac{Du}{Dt}=-\frac{\partial p}{\partial x}+\frac{\partial \tau_{xx}}{\partial x}+\frac{\partial \tau_{yx}}{\partial y}+\frac{\partial \tau_{zx}}{\partial z}+\rho f_x\) will become zero for formulating Euler equation? |
| A. | fx, τyx, τzx |
| B. | τxx, τyx, u |
| C. | τxx, τyx, τzx |
| D. | τxx, p, τzx |
| Answer» D. τxx, p, τzx | |
| 4. |
Which of these equations represent a Euler equation? |
| A. | \(\rho\frac{Dv}{Dt}=-\nabla p+\rho g\) |
| B. | \(\rho\frac{Dv}{Dt}=-\nabla p+\mu\nabla^2 v+\rho g\) |
| C. | ∇p=μ∇2v+ρg |
| D. | 0=μ∇2v+ρg |
| Answer» B. \(\rho\frac{Dv}{Dt}=-\nabla p+\mu\nabla^2 v+\rho g\) | |
| 5. |
There is no difference between Navier-Stokes and Euler equations with respect to the continuity equation. Why? |
| A. | Convection term plays the diffusion term’s role |
| B. | Diffusion cannot be removed from the continuity equation |
| C. | Its source term balances the difference |
| D. | The continuity equation by itself has no diffusion term |
| Answer» E. | |
| 6. |
Euler form of momentum equations does not involve this property. |
| A. | Stress |
| B. | Friction |
| C. | Strain |
| D. | Temperature |
| Answer» C. Strain | |
| 7. |
Eulerian equations are suitable for which of these cases? |
| A. | Compressible flows |
| B. | Incompressible flows |
| C. | Compressible flows at high Mach number |
| D. | Incompressible flows at high Mach number |
| Answer» E. | |
| 8. |
Which of these is the non-conservative differential form of Eulerian x-momentum equation? |
| A. | \(\frac{\partial(\rho u)}{\partial t}+\nabla.(\rho u\vec{V})=-\frac{\partial p}{\partial x}+\rho f_x\) |
| B. | \(\rho\frac{Du}{Dt}=-\frac{\partial p}{\partial x}+\rho f_x\) |
| C. | \(\frac{(\rho u)}{\partial t}=-\frac{\partial p}{\partial x}+\rho f_x\) |
| D. | \(\rho \frac{\partial u}{\partial t}=-\frac{\partial p}{\partial x}+\rho f_x\) |
| Answer» C. \(\frac{(\rho u)}{\partial t}=-\frac{\partial p}{\partial x}+\rho f_x\) | |
| 9. |
Euler equations govern ____________ flows. |
| A. | Viscous adiabatic flows |
| B. | Inviscid flows |
| C. | Adiabatic and inviscid flows |
| D. | Adiabatic flows |
| Answer» D. Adiabatic flows | |
| 10. |
The general transport equation is \(\frac{\partial(\rho \Phi)}{\partial t}+div(\rho \Phi \vec{u})+div(\Gamma grad \Phi)+S\). For Eulerian equations, which of the variables in the equation becomes zero? |
| A. | Γ |
| B. | ρ |
| C. | Φ |
| D. | \(\vec{u}\) |
| Answer» B. ρ | |