MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Aircraft Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The change in local air flow velocity will produce small change in skin friction drag. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
If I want to design an aircraft which primary flies in a low speed region then, which type of drag shouldn t be considered? |
| A. | Wave drag |
| B. | Parasite drag |
| C. | Induced drag |
| D. | Form drag only |
| Answer» B. Parasite drag | |
| 3. |
What is interference drag? |
| A. | Drag produced by interaction of different components |
| B. | Skin friction drag |
| C. | Lift induced drag |
| D. | Drag due to weight of the aircraft only |
| Answer» B. Skin friction drag | |
| 4. |
Induced drag of the airfoil is _____ |
| A. | 0.0N |
| B. | 1.2N |
| C. | 20 N |
| D. | 25.8KN |
| Answer» B. 1.2N | |
| 5. |
Drag which is produced due to lift is called? |
| A. | Induced drag |
| B. | Parasite drag |
| C. | Weight |
| D. | Thrust drag |
| Answer» B. Parasite drag | |
| 6. |
Wave drag is produced due to ________ |
| A. | shock wave formation |
| B. | incompressible flow |
| C. | fluid is not compressible |
| D. | flow separation of incompressible flow |
| Answer» B. incompressible flow | |
| 7. |
The location of separation point will depend on ________ |
| A. | curvature of the body |
| B. | body weight |
| C. | mass of body |
| D. | only on body length |
| Answer» B. body weight | |
| 8. |
_______ is one of the sources of drag. |
| A. | Viscous separation |
| B. | Drafting |
| C. | Signal strength |
| D. | Lift only |
| Answer» B. Drafting | |
| 9. |
Increment in the skin friction drag due to prop-wash is called _________ |
| A. | scrubbing drag |
| B. | vortex |
| C. | swirl |
| D. | curling flow |
| Answer» B. vortex | |
| 10. |
Skin friction drag is defined as _________ |
| A. | drag due to friction between skin and fluid flow |
| B. | wing lift drag |
| C. | such drag does not exist |
| D. | lift induced |
| Answer» B. wing lift drag | |
| 11. |
Consider an incompressible flow. If static pressure increases then, the local freestream velocity __________ |
| A. | decreases |
| B. | increase |
| C. | remains same |
| D. | insufficient data |
| Answer» B. increase | |
| 12. |
If static air pressure is 0.5 bar and dynamic pressure is 0.85 bar then, find total pressure acting on a body. |
| A. | 1.35 |
| B. | 5 |
| C. | 7 |
| D. | 8.56 |
| Answer» B. 5 | |
| 13. |
For an incompressible flow, if local area velocity decreases then, the dynamic pressure will ________ |
| A. | decrease |
| B. | increase |
| C. | constant |
| D. | independent of velocity |
| Answer» B. increase | |
| 14. |
For ideal flow, total pressure along streamline will be _________ |
| A. | constant |
| B. | increases |
| C. | decreases |
| D. | always decreases by half |
| Answer» B. increases | |
| 15. |
Aerodynamic forces are generated due to ______________ |
| A. | shear and pressure force acting on body |
| B. | shear effects only |
| C. | only pressure forces |
| D. | twisting of beam |
| Answer» B. shear effects only | |