ATPL Principles of Flight and Aerodynamics

Question 1

According to Bernoulli's principle, what happens to static pressure when airflow velocity increases over an airfoil?

Accepted Answer

Static pressure decreases

Answer

Bernoulli's principle states that as fluid velocity increases, static pressure decreases, creating the pressure differential across the wing that generates lift.

Question 2

The angle of attack (AOA) is defined as the angle between:

Accepted Answer

The relative wind and the chord line of the wing

Answer

Angle of attack is measured between the free-stream relative wind and the chord line of the airfoil, regardless of the aircraft's pitch attitude.

Question 3

Which type of aerodynamic drag increases as airspeed increases?

Accepted Answer

Parasite drag

Answer

Parasite drag (including form, interference, and skin friction drag) increases proportionally with the square of airspeed.

Question 4

Induced drag is directly associated with:

Accepted Answer

Lift production

Answer

Induced drag is a byproduct of lift generation, caused by wingtip vortices that create a rearward tilting of the lift vector.

Question 5

A stall of an airfoil occurs when:

Accepted Answer

The critical angle of attack is exceeded

Answer

A stall occurs when the critical angle of attack is exceeded, causing boundary layer separation and a dramatic loss of lift regardless of airspeed.

ATPL - Airline Transport Pilot License Practice Test

ATPL - Airline Transport Pilot License Practice Test

ATPL Principles of Flight and Aerodynamics