AQT AQT Aerodynamics & Flight Principles 2 — Questions and Answers
Question 1: What is the primary purpose of an aircraft's horizontal stabilizer?
- Provide additional lift
- Control roll
- Provide pitch stability (Correct answer)
- Reduce drag
Correct answer: Provide pitch stability
The horizontal stabilizer provides longitudinal (pitch) stability by creating a stabilizing moment about the aircraft's center of gravity.
Question 2: During a coordinated turn, what happens to the stall speed?
- It decreases
- It stays the same
- It increases (Correct answer)
- It becomes zero
Correct answer: It increases
In a turn, load factor increases, requiring higher lift to maintain altitude, which raises the effective stall speed.
Question 3: What is ground effect in aviation?
- Turbulence near the ground
- Increased drag when landing
- Reduced induced drag when near a surface (Correct answer)
- Wind shear at low altitude
Correct answer: Reduced induced drag when near a surface
Ground effect is the reduction in induced drag that occurs when a wing is within one wingspan's length of the ground due to interrupted vortex formation.
Question 4: What is the purpose of flaps on an aircraft wing?
- Increase cruise speed
- Increase lift and drag at lower speeds (Correct answer)
- Reduce weight
- Improve fuel efficiency
Correct answer: Increase lift and drag at lower speeds
Flaps increase the wing's camber and area, generating more lift and drag at lower airspeeds to enable safer takeoffs and landings.
Question 5: What is the load factor in a 60-degree banked level turn?
- 1.0 G
- 1.4 G
- 2.0 G (Correct answer)
- 3.0 G
Correct answer: 2.0 G
In a 60-degree banked level turn, the load factor is 2.0 G because the lift must support twice the aircraft's weight to maintain altitude.
Question 6: What is the chord line of a wing?
- The longest dimension of the wing
- An imaginary line from the leading to trailing edge (Correct answer)
- The curved upper surface of the wing
- The wingspan measured tip to tip
Correct answer: An imaginary line from the leading to trailing edge
The chord line is a straight imaginary line drawn from the leading edge to the trailing edge of an airfoil, used as a reference for measuring angles.
AQT AQT Aerodynamics & Flight Principles 2
What is the primary purpose of an aircraft's horizontal stabilizer?