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MTSU Aerospace Practice Test

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Which of the following is NOT a parasite drag type?
Correct Answer:
Induced drag
Explanation:
Drag is split into parasite drag and induced drag. Parasite drag includes form drag, which comes from the shape and pressure distribution around the aircraft; skin friction drag, due to viscous shear on the surfaces; and interference drag, from the disruption of flow where components meet. Induced drag is different because it arises from the wing producing lift. The lift creates wingtip vortices and a downwash that costs energy, showing up as drag even though it isn’t caused by surface friction or pressure on the airframe. Because it’s not tied to the airframe’s surface interactions like the other three, induced drag is not a parasite drag type.

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