MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Up to which Mach number is Prandtl Glauert rule applicable for subsonic flow? |
| A. | 1 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 0.65 |
| Answer» D. 0.65 | |
| 2. |
For a subsonic flow, how does the coefficient of pressure vary with increasing Mach number? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | First increases, then decreases |
| Answer» B. Decreases | |
| 3. |
Linearized theory is applicable for transonic regions as well. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
What does the Prandtl Glauert rule relate? |
| A. | Shape of airfoil in transformed spaces |
| B. | Incompressible flow to the compressible flow for same airfoil |
| C. | Coefficient of lift to coefficient of pressure |
| D. | Coefficient of drag to coefficient of pressure |
| Answer» C. Coefficient of lift to coefficient of pressure | |
| 5. |
The shape of the airfoil in both (x, y) and transformed ( , ) space are different. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
Which of the equations governs the linearized incompressible flow over an airfoil at subsonic velocity using transformed coordinate system? |
| A. | Laplace s equation |
| B. | Euler s equation |
| C. | Navier Stokes equation |
| D. | Cauchy s equation |
| Answer» B. Euler s equation | |
| 7. |
Which of these is the linearized perturbation velocity potential equation over a thin airfoil in a subsonic compressible flow? |
| A. | <sup>2</sup>( <sub>xx</sub> + <sub>yy</sub>) = 0 |
| B. | <sub>xx</sub> + <sub>yy</sub> = 0 |
| C. | <sup>2</sup> <sub>xx</sub> + <sub>yy</sub> = 0 |
| D. | <sup>2</sup> <sub>xx</sub> + <sub>xy</sub> = 0 |
| Answer» D. <sup>2</sup> <sub>xx</sub> + <sub>xy</sub> = 0 | |
| 8. |
What is the surface boundary condition for a thin airfoil at a subsonic flow? (Where shape of the airfoil is represented as y = f(x)) |
| A. | ( frac { }{ x} ) = V<sub> </sub> ( frac {df}{dx} ) |
| B. | ( frac { }{ y} = frac {df}{dy} ) |
| C. | ( frac { }{ x} ) = V (_ ^2 frac {df}{dx} ) |
| D. | ( frac { }{ x} = frac {dV_ }{dx} ) |
| Answer» B. ( frac { }{ y} = frac {df}{dy} ) | |