Which of the following are three forms of parasite drag?

Parasite drag is a type of drag that occurs when an aircraft is moving through the air, and it comprises several components. The correct answer identifies the three forms of parasite drag as form drag, interference drag, and skin friction drag.

Form drag arises from the shape of the aircraft and its components, with more streamlined shapes producing less drag. It is related to the pressure differences on the front and back surfaces of the object.

Interference drag occurs when airflow around different components of the aircraft interacts, leading to increased drag. This is especially relevant in areas where airflows overlap, such as the junction of wings and fuselage, which can create additional turbulence and drag.

Skin friction drag is related to the surface texture of the aircraft. It arises from the friction between the air and the surface of the aircraft as it moves through the air, with rougher surfaces generating more drag.

Understanding these components helps pilots and engineers work on design aspects to reduce drag, thus improving performance, fuel efficiency, and speed. The incorrect options mention various types of drag that do not accurately classify parasite drag, such as induced drag, which is related to the generation of lift, or total drag, which includes both parasite and induced drag.