MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is blade lock number? |
| A. | Ratio of inertial and aerodynamic force |
| B. | Ratio of aerodynamic and inertial force |
| C. | Ratio of viscous force and aerodynamic force |
| D. | Ratio of inertial force and viscous force |
| Answer» C. Ratio of viscous force and aerodynamic force | |
| 2. |
What is the value of linear twist rate in general? |
| A. | Zero |
| B. | Positive |
| C. | Negative |
| D. | Infinite |
| Answer» D. Infinite | |
| 3. |
What is the formula to compute the moment of inertia of the rotor blade about center of rotation? |
| A. | I<sub>b</sub>= ( int _0 ^R )mr<sup>2</sup>dr |
| B. | I<sub>b</sub>= ( int _0 ^R )mr<sup>3</sup>dr |
| C. | I<sub>b</sub>= ( int _0 ^R frac {m}{r^2} )dr |
| D. | I<sub>b</sub>= ( int _0 ^R frac {m}{r^3} )dr |
| Answer» B. I<sub>b</sub>= ( int _0 ^R )mr<sup>3</sup>dr | |
| 4. |
What is the azimuth angle of the rotor blade for a constant rotational speed? |
| A. | 0 |
| B. | |
| C. | t |
| D. | 2 t |
| Answer» D. 2 t | |
| 5. |
What are the components of rotor? |
| A. | Mast |
| B. | Hub |
| C. | Blade |
| D. | Shaft |
| Answer» E. | |
| 6. |
Why are twin rotor configuration used? |
| A. | To generate more lift |
| B. | To counter torques |
| C. | To generate pitching motion |
| D. | To generate yaw motion |
| Answer» D. To generate yaw motion | |
| 7. |
Teetering rotors have blade attached to hub without hinges which is attached to the shaft by the gimbal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
What values of aspect ratio is generally used for helicopter rotor blades? |
| A. | Zero |
| B. | Low |
| C. | High |
| D. | One |
| Answer» D. One | |
| 9. |
What is the rotor whose blades are attached to the hub with hinges called? |
| A. | Teetering rotor |
| B. | Articulated rotor |
| C. | Hinge rotor |
| D. | Flap and lag rotor |
| Answer» C. Hinge rotor | |
| 10. |
How are the aerodynamic forces of the rotor controlled? |
| A. | Feathering motion |
| B. | Lag motion |
| C. | Flap motion |
| D. | Yaw motion |
| Answer» B. Lag motion | |
| 11. |
What kind of motion is produced by the hinged blade which is lying in the plane of rotor disk? |
| A. | Flap motion |
| B. | Lag motion |
| C. | Yaw motion |
| D. | Roll motion |
| Answer» B. Lag motion | |
| 12. |
Which of these has the lowest disk loading? |
| A. | Quadcopter |
| B. | Helicopter |
| C. | Airplane |
| D. | Cyclocopters |
| Answer» C. Airplane | |
| 13. |
Why does helicopter have huge rotors? |
| A. | Induced power is inversely proportional to rotor radius |
| B. | Induced power is directly proportional to rotor radius |
| C. | Wing loading is inversely proportional to rotor radius |
| D. | Wing loading is directly proportional to rotor radius |
| Answer» B. Induced power is directly proportional to rotor radius | |
| 14. |
What would an efficient vertical flight mean? |
| A. | Low power loading |
| B. | High lift |
| C. | Less drag |
| D. | Less pressure difference |
| Answer» B. High lift | |