MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How is local velocity of sound related to the Riemann invariants? |
| A. | a = ( frac { 1}{4} )(J<sub>+</sub> + J<sub> </sub>) |
| B. | u = ( frac { 1}{4} )(J<sub>+</sub> J<sub> </sub>) |
| C. | a = ( frac { 1}{4} )(J<sub>+</sub> J<sub> </sub>) |
| D. | a = 1(J<sub>+</sub> J<sub> </sub>) |
| Answer» D. a = 1(J<sub>+</sub> J<sub> </sub>) | |
| 2. |
If the Riemann variants are known, how can we compute the mass motion velocity u? |
| A. | ( frac {J_++J_-}{2} ) |
| B. | ( frac {J_+-J_-}{2} ) |
| C. | ( frac {J_+ J_-}{3} ) |
| D. | ( frac {J_+ J_-}{6} ) |
| Answer» B. ( frac {J_+-J_-}{2} ) | |
| 3. |
What is the Riemann invariant for C+ characteristic line? |
| A. | J<sub>+</sub> = u + ( frac {dp}{ a} ) = <i>constant</i> |
| B. | J<sub>+</sub> = u ( frac {dp}{ a} ) = <i>constant</i> |
| C. | J<sub>+</sub> = u + ( frac {dp}{ a} ) |
| D. | J<sub>+</sub> = u ( frac {dp}{ a} ) |
| Answer» B. J<sub>+</sub> = u ( frac {dp}{ a} ) = <i>constant</i> | |
| 4. |
Riemann invariants are obtained by differentiating the compatibility equations for the characteristic lines. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
What is the slope for C characteristic line? |
| A. | u + a |
| B. | u a |
| C. | ua |
| D. | ( frac {u}{a} ) |
| Answer» C. ua | |
| 6. |
Which of these is the compatibility equation along C+ characteristic line? |
| A. | du + ( frac {dp}{ a} ) = 0 |
| B. | du ( frac {dp}{ a} ) = 0 |
| C. | ( frac {dpu}{ a} ) = 0 |
| D. | ( frac {du}{ a} ) = 0 |
| Answer» B. du ( frac {dp}{ a} ) = 0 | |
| 7. |
Which of these is not a property of finite wave? |
| A. | The perturbations are large |
| B. | Wave shape changes |
| C. | Linear equations are used to govern the flow variables |
| D. | Wave propagates with added local speed and speed of sound |
| Answer» D. Wave propagates with added local speed and speed of sound | |
| 8. |
What is the region in a finite wave called where density increases? |
| A. | Compression region |
| B. | Expansion region |
| C. | Linearized region |
| D. | Propagating region |
| Answer» B. Expansion region | |
| 9. |
Finite wave s properties such as density, velocity are a function of distance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
What are finite waves? |
| A. | Waves with large perturbations |
| B. | Sound waves |
| C. | Weak waves |
| D. | Waves with small temperature fluctuations |
| Answer» B. Sound waves | |