FAA Private Pilot Exam 4

Question 1

VNO is defined as the

Accepted Answer

maximum structural cruising speed.

Answer

VNO, or Maximum Normal Operating Speed, is defined as the maximum structural cruising speed. It represents the upper limit of the green arc on the airspeed indicator. Operating above VNO, especially in turbulent air, can lead to structural damage, making it a critical speed for safe flight operations.

Question 2

When are the four forces that act on an airplane in equilibrium?

Accepted Answer

During unaccelerated flight.

Answer

The four forces acting on an airplane—lift, weight, thrust, and drag—are in equilibrium during unaccelerated flight. This condition means the aircraft is either at rest or moving at a constant velocity (constant speed and direction). Any change in speed or direction (acceleration) indicates an imbalance among these forces.

Question 3

Wingtip vortices are created only when an aircraft is

Accepted Answer

developing lift.

Answer

Wingtip vortices are a direct consequence of a wing generating lift. As the wing creates lift, higher pressure air from beneath the wing flows around the wingtip to the lower pressure area above, forming swirling air masses. These vortices are strongest when the aircraft is heavy, slow, and in a clean configuration, requiring a high angle of attack for lift.

Question 4

If an airplane weighs 4,500 pounds, what approximate weight would the airplane structure be required to support during a 45° banked turn while maintaining altitude?

Accepted Answer

6,300 pounds.

Answer

In a banked turn, the load factor (G-force) increases, effectively increasing the aircraft's weight. For a 45° banked turn, the load factor is approximately 1.41 (calculated as 1 / cosine of the bank angle). Therefore, the aircraft structure must support 4,500 pounds multiplied by 1.41, which equals approximately 6,345 pounds, or 6,300 pounds rounded.

Question 5

What is ground effect?

Accepted Answer

The result of an alteration in airflow patterns increasing induced drag about the wings of an airplane.

Answer

Ground effect is the phenomenon where the presence of the Earth's surface alters the airflow patterns around an airplane's wings when flying very close to the ground. This interference reduces induced drag and increases lift, making the aircraft more efficient. It is a significant factor during takeoff and landing, affecting aircraft performance.

FAA Practice Test

FAA Practice Test

FAA Private Pilot Exam 4