MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the lift coefficient for an aircraft at low speed is 0.45, then what is the value of the coefficient of drag at Mach number 0.7? |
| A. | 0.51 |
| B. | 0.49 |
| C. | 0.63 |
| D. | 0.71 |
| Answer» D. 0.71 | |
| 2. |
What is the relation between linearized pressure coefficient for compressible Cp and incompressible flow Cp,0? |
| A. | Cp = βCp,0 |
| B. | Cp = \(\frac {C_{p.0}}{β}\) |
| C. | Cp = \(\frac {β}{C_{p.0}}\) |
| D. | Cp = β2Cp,0 |
| Answer» C. Cp = \(\frac {β}{C_{p.0}}\) | |
| 3. |
For which of these conditions is Prandtl – Glauert compressibility equation valid? |
| A. | Thick airfoil, small angle of attack |
| B. | Thick airfoil, large angle of attack |
| C. | Thin airfoil, large angle of attack |
| D. | Thin airfoil, small angle of attack |
| Answer» E. | |
| 4. |
Prandtl – Glauert compressibility correction is based on which of the following methods? |
| A. | Velocity potential equation |
| B. | Energy equation |
| C. | Momentum equation |
| D. | Continuity equation |
| Answer» B. Energy equation | |
| 5. |
For which of thee flows is Prandtl – Glauert compressibility correction is effective? |
| A. | Subsonic flow |
| B. | Sonic flow |
| C. | Supersonic flow |
| D. | Hypersonic flow |
| Answer» B. Sonic flow | |
| 6. |
Prandtl – Glauert compressibility correction is applied for finding airfoil properties at low speed. |
| A. | True |
| B. | False |
| Answer» C. | |