Aviation Standard Test Battery-E (ASTB E) Practice Test

What does the chord line of a wing represent?

1. The length of the fuselage

2. The angle of attack of the wing

3. The division between the upper and lower surfaces of the wing

4. The position of the aircraft relative to the ground

The correct answer is: The division between the upper and lower surfaces of the wing

The chord line of a wing is indeed a crucial concept in aviation and aerodynamics. It represents the straight line connecting the leading edge and the trailing edge of the wing. This line effectively divides the wing into an upper surface and a lower surface, illustrating the wing’s shape and how airflow interacts with it during flight. Understanding this division is essential for analyzing lift and aerodynamic performance. The shape of the wing, in relation to the chord line, influences how air behaves around it and affects factors like lift generation, drag, and stall characteristics. This is why the correct choice relates directly to the physical structure of the wing itself and its aerodynamic properties.