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Aerodynamics Practice Test: Flow over Airfoils over Finite Wing
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Avg score: 3% • Most missed: “The incorrect choice for the general lift distribution for a finite wing is ____…”
Flow over Airfoils over Finite Wing topics include: Downwash and induced drag, vortex filament, biot savart law, helmholtz theorem, prandtl’s classical lifting line and lifting surface theory. Flow over a finite wing is three-dimensional, while flow over an airfoil is two-dimensional. The flow tends to leak around the wing tips, creating a trailing vortex at each tip.  The flow over the wing creates a circulatory motion that trails downstream. This motion creates wing-tip vortices that induce a small downward component of air velocity. This downward component is called downwash. The... Show more
Aerodynamics Practice Test: Flow over Airfoils over Finite Wing
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25 Questions

1. Is wing tips vortices produce the down wash?
2. A condition in which the wing has different values of α along the span is called as ______
3. Is Newton’s third law of motion is an application for lift on airfoil?
4. Is local induced change the angle of attack on a given section of a wing?
5. The correct formula for profile drag coefficient over the finite wing is_______
6. Is vortex filament equation can be modified to include the effects of point vortices?
7. Biot-Savart law can be used to describe inviscid, incompressible flows.
8. Is lift is produced by the changing direction of the flow?
9. If the geometric angle of attack is higher at the tip than the root, it is called as ______
10. The incorrect statement in relation to the fundamental equation of Prandtls lifting line theory is_____
11. Identify the source which does not cause drag on a finite wing.
12. For a finite wing and an infinite wing (airfoil), zero lift angle of attack is zero.
13. Is strength of a vortex tube vary with time?
14. The incorrect statement regarding Helmholtz theorems is____
15. For an elliptical lift distribution, the planform area is also elliptical for a wing.
16. Is a higher aspect ratio flat plates has a higher lift?
17. Is vortex filament is a very thin strip?
18. Induced drag is generated by a component of lift for a finite wing.
19. The airfoil and the wing behave exactly the same way in terms of aerodynamic properties.
20. Is Helmholtz’s theorems apply to inviscid flows?
21. The downward velocity induced by the trailing vortex in the vicinity of the wing-tips is called as _____
22. Is lift and drag are the total aerodynamic force acting the body?
23. For a finite wing, the local airfoil section sees the angle of attack which is called as ____
24. The lift coefficient for the airfoil section on a wing ______
25. Is circular filament is of constant thickness?

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