MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Determine the value for maximum camber for NACA1235 airfoil. Given chord is 1m. |
| A. | 0.01m |
| B. | 0.02m |
| C. | 0.021 |
| D. | 0.012 |
| Answer» B. 0.02m | |
| 2. |
For a cambered airfoil section lift is 30N. Airfoil is operating in such way that dynamic lift is 20N. Determine the lift co-efficient for the airfoil. |
| A. | 1.5 |
| B. | 1.5N |
| C. | 0.5 |
| D. | 0.5N |
| Answer» B. 1.5N | |
| 3. |
A thin airfoil is defined as NACA 0009 is at = 5 . What is the value of lift curve slope? |
| A. | 2 per rad |
| B. | 2 per degree |
| C. | 4 per degree |
| D. | 0.4 per degree |
| Answer» B. 2 per degree | |
| 4. |
An airfoil with symmetric profile has pitching moment about aerodynamic centre as 13 Nm at 4 AOA. Determine Pitching moment at same point if AOA is increased by 8 . |
| A. | 13Nm |
| B. | 8Nm |
| C. | 5Nm |
| D. | 13Ncm |
| Answer» B. 8Nm | |
| 5. |
Camber represents the curvature of an airfoil. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Determine the corrections or otherwise of the following assertion [A] and reason [R]:Assertion [A]: Most of the airfoils are built with blunt trailing edge having very small finite thickness. |
| A. | nReason[R]: Perfect sharp trailing edge is difficult to build. |
| B. | Both [A] and [R] are true and [R] is the correct reason for [A] |
| C. | Both [A] and [R] are true but [R] is not the correct reason for [A] |
| D. | [A] is true but [R] is false |
| E. | [A] is false but [R] is true |
| Answer» B. Both [A] and [R] are true and [R] is the correct reason for [A] | |
| 7. |
The straight line joining L.E. and T.E. of an airfoil is _______ |
| A. | chord line |
| B. | camber |
| C. | camber line |
| D. | radii |
| Answer» B. camber | |
| 8. |
NACA stands for _____ |
| A. | National Advisory Committee for Aeronautics |
| B. | National Authorized Committee for Aeronautics |
| C. | National Advisory Committee for Aero models |
| D. | National Advisory Committee for Arithmetic |
| Answer» B. National Authorized Committee for Aeronautics | |
| 9. |
Which of the following is not an application of an airfoil? |
| A. | To provide thrust for acceleration |
| B. | To provide lift |
| C. | To provide lift co-efficient |
| D. | To provide streamlined flow |
| Answer» B. To provide lift | |
| 10. |
If an airfoil is operating at Mach 1.1, then it is working in _____ |
| A. | transonic range |
| B. | supersonic range |
| C. | subsonic range |
| D. | hypersonic range |
| Answer» B. supersonic range | |