MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For very high aspect ratio wings, the lift curve slope resembles that of the airfoil. |
| A. | False |
| B. | True |
| Answer» C. | |
| 2. |
The values of lift slope for elliptic wing (ae) and general planform wing (a) is less than that for airfoil (a0).Mark the false statement. |
| A. | a<sub>e</sub>= ( frac {a_0}{1+ frac {a_0}{ pi AR}} ) |
| B. | a= ( frac {a_0}{1+ frac {a_0}{ pi AR}(1+ tau)} ) |
| C. | a<sub>0</sub> is always 2 |
| D. | is a function of Fourier coefficients |
| Answer» D. is a function of Fourier coefficients | |
| 3. |
For a finite wing and an infinite wing (airfoil), zero lift angle of attack is zero. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The incorrect difference between airfoil and wings is_______ |
| A. | Presence of induced drag in wings |
| B. | Different effective angles of attack seen by |
| C. | Difference in the lift-curve slope |
| D. | Lift slope of the wing is higher than of airfoil |
| Answer» E. | |
| 5. |
Tapered wings are used more rather than elliptical wing planforms practically. The reason being______ |
| A. | Easy to manufacture than elliptic wings |
| B. | Aspect ratio more important for low induced drag |
| C. | Tapered wing resembles elliptic wing highly |
| D. | Tapered wing is another name for elliptic wing |
| Answer» B. Aspect ratio more important for low induced drag | |
| 6. |
The elliptical lift distribution has a major interest in making wings because_____ |
| A. | Minimum induced drag |
| B. | e = 0 |
| C. | = 1 |
| D. | Aspect ratio lowest |
| Answer» B. e = 0 | |
| 7. |
Select the incorrect equation for the induced drag coefficient for a finite wing. |
| A. | C<sub>D,i</sub>= ( frac {C_l^2}{ pi AR} )(1+ ) |
| B. | C<sub>D,i</sub>= ( frac {C_l^2}{ pi AR} ) |
| C. | C<sub>D,i</sub>= ( frac {C_l^2s}{ pi eb^2 } ) |
| D. | C<sub>D,i</sub>= ( frac {C_l^2}{ pi eAR} ) |
| Answer» C. C<sub>D,i</sub>= ( frac {C_l^2s}{ pi eb^2 } ) | |
| 8. |
The incorrect choice for the general lift distribution for a finite wing is ________ |
| A. | Circulation is assumed a Fourier series |
| B. | 0 &leq; &leq; 2 |
| C. | Coordinate transformation is for spanwise direction to |
| D. | Coefficient of lift depends on aspect ratio directly |
| Answer» C. Coordinate transformation is for spanwise direction to | |
| 9. |
For an elliptical lift distribution, the planform area is also elliptical for a wing. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The incorrect statement for a finite wing with elliptical lift distribution out of the following is_____ |
| A. | Induced drag coefficient coefficient of lift |
| B. | Induced drag coefficient increases rapidly with lift |
| C. | Induced drag coefficient is around 25% |
| D. | To reduce induced drag, we want wing with the lowest aspect ratio |
| Answer» E. | |
| 11. |
For a finite wing, induced drag increases with an increase in aspect ratio. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 12. |
The induced angle of attack for an elliptical lift distribution increase when ______ |
| A. | Lift decreased |
| B. | Aspect ratio decreased |
| C. | Decrease in planform area |
| D. | Increase in span length |
| Answer» C. Decrease in planform area | |