Aviation Aerodynamics & Aircraft Performance

Question 1

Which of the four aerodynamic forces acts opposite to the direction of flight?

Accepted Answer

Drag

Answer

Lift

Answer

Thrust

Answer

Weight

Question 2

According to Bernoulli's principle, what happens to air pressure as airspeed over a wing increases?

Accepted Answer

Pressure decreases

Answer

Pressure increases

Answer

Pressure remains constant

Answer

Pressure fluctuates randomly

Question 3

What is the angle of attack?

Accepted Answer

The angle between the chord line and the relative wind

Answer

The angle between the runway and the aircraft's nose

Answer

The angle between the aircraft and the horizon

Answer

The pitch angle of the propeller blades

Question 4

What occurs when a wing exceeds its critical angle of attack?

Accepted Answer

The wing stalls and lift decreases dramatically

Answer

Lift doubles instantly

Answer

The aircraft enters a spin automatically

Answer

Drag drops to zero

Question 5

What type of drag is caused by the generation of lift?

Accepted Answer

Induced drag

Answer

Parasite drag

Answer

Form drag

Answer

Profile drag

Question 6

As altitude increases, how does air density affect aircraft performance?

Accepted Answer

Thinner air reduces engine power and requires higher true airspeed to maintain lift

Answer

Denser air improves engine power and lift equally

Answer

Performance is unaffected because indicated airspeed stays the same

Answer

Lift increases because the wings work more efficiently

Question 7

What is the primary purpose of an aircraft's flaps?

Accepted Answer

To increase lift and drag for slower flight and shorter landings

Answer

To increase cruise speed

Answer

To reduce induced drag during climb

Answer

To provide roll control at low speeds