MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Characteristic curves passing through a point in a flow field are straight lines. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
How many characteristic lines pass through the flow field in supersonic flow? |
| A. | 1 |
| B. | 2 |
| C. | 0 |
| D. | 4 |
| Answer» C. 0 | |
| 3. |
For subsonic flows, the characteristics through a flow field point are imaginary. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which partial differential equation is used to define the characteristic at sonic condition? |
| A. | Hyperbolic partial differential equation |
| B. | Parabolic partial differential equation |
| C. | Elliptic partial differential equation |
| D. | Circular partial differential equation |
| Answer» C. Elliptic partial differential equation | |
| 5. |
How many characteristics pass through a point in the flow field if the Mach number is greater than 1? |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 0 |
| Answer» C. 4 | |
| 6. |
Which of these equations defines the characteristic curve in an x – y plane? |
| A. | \(\frac {dy}{dx_{char}} = \frac {- \frac {uv}{a^{2}} ± (\frac {u^2 + v^{2}}{a^{2}}) – 1}{1 – \frac {u^{2}}{a^{2}}}\) |
| B. | \(\frac {dy}{dx_{char}} = \frac {- \frac {uv}{a^{2}} ± \sqrt {(\frac {u^{2} + v^{2}}{a^{2}})}}{\frac {u^{2}}{a^{2}}}\) |
| C. | \(\frac {dy}{dx_{char}} = – \frac {uv}{a^{2}} ± \sqrt {(\frac {u^2 + v^{2}}{a^{2}})-1}\) |
| D. | \(\frac {dy}{dx_{char}} = \frac {- \frac {uv}{a^{2}} ± \sqrt {(\frac {u^2 + v^{2}}{a^{2}})-1}}{1 – \frac {u^{2}}{a^{2}}}\) |
| Answer» E. | |
| 7. |
What is the value of derivative of flow field along characteristic line? |
| A. | Zero |
| B. | Indeterminate |
| C. | One |
| D. | 0.5 |
| Answer» C. One | |