PPL Aeronautical Knowledge 2 — Questions and Answers
Question 1: What does the term 'angle of attack' refer to?
- The angle between the chord line and the relative wind (Correct answer)
- The angle between the wing and the horizon
- The pitch attitude shown on the attitude indicator
- The angle between the longitudinal axis and the ground
Correct answer: The angle between the chord line and the relative wind
Angle of attack is the angle between the wing's chord line and the relative wind.
Question 2: An aircraft will always stall at the same:
- Airspeed regardless of attitude
- Angle of attack (Correct answer)
- Power setting
- Altitude
Correct answer: Angle of attack
A wing always stalls at the same critical angle of attack, though the corresponding airspeed varies.
Question 3: What is the primary purpose of wing flaps?
- To increase cruise speed
- To increase lift and drag for slower approach speeds (Correct answer)
- To reduce stall angle of attack
- To improve fuel efficiency
Correct answer: To increase lift and drag for slower approach speeds
Flaps increase both lift and drag, allowing steeper, slower approaches.
Question 4: Load factor is defined as the ratio of:
- Thrust to drag
- Total weight of aircraft to fuel weight
- Load supported by the wings to the actual weight of the aircraft (Correct answer)
- Lift to thrust
Correct answer: Load supported by the wings to the actual weight of the aircraft
Load factor is the ratio of the load the wings support to the aircraft's actual weight.
Question 5: During a coordinated level turn, stall speed:
- Decreases
- Increases (Correct answer)
- Remains the same
- Drops to zero
Correct answer: Increases
Load factor increases in a turn, which raises the stall speed.
Question 6: What causes an airplane to yaw to the left during takeoff at full power (torque effect)?
- Adverse yaw only
- Propeller slipstream, torque, P-factor, and gyroscopic precession (Correct answer)
- Crosswind from the right
- Excessive right rudder
Correct answer: Propeller slipstream, torque, P-factor, and gyroscopic precession
The left-turning tendencies combine torque, P-factor, slipstream, and gyroscopic precession.
Question 7: Ground effect is most likely to result in which problem?
- Reduced lift on takeoff
- Becoming airborne before reaching recommended climb speed (Correct answer)
- Increased induced drag near the ground
- A steeper stall angle
Correct answer: Becoming airborne before reaching recommended climb speed
Ground effect reduces induced drag, so the aircraft can lift off before reaching a safe climb speed.
PPL Aeronautical Knowledge 2
What does the term 'angle of attack' refer to?