Aerodynamics & Systems

5 free sample questions of the 53 in this topic. The full set is in the app.

1. Question 1

   A wing stalls because:

   • A.Airspeed is below a fixed number
   • B.The critical angle of attack is exceeded
   • C.The engine loses power
   • D.The altitude is too high
   Show answer & explanation

   Answer: B. The critical angle of attack is exceeded

   A stall is caused by exceeding the critical AOA. Stalls can occur at any airspeed, attitude, or power setting.

2. Question 2

   What is the load factor in a coordinated, level turn at a 60° bank?

   • A.1.0
   • B.1.41
   • C.2.0
   • D.3.0
   Show answer & explanation

   Answer: C. 2.0

   Load factor in a level turn is 1/cos(bank). At 60°, cos = 0.5, so load factor = 2.0 Gs.

3. Question 3

   What happens to stall speed as load factor increases?

   • A.It decreases
   • B.It stays the same
   • C.It increases as the square root of the load factor
   • D.It doubles for every G
   Show answer & explanation

   Answer: C. It increases as the square root of the load factor

   Stall speed rises proportional to √(load factor). At 2 Gs, stall speed is about √2 ≈ 1.41× the 1-G value.

4. Question 4

   Ground effect is most noticeable when an airplane is:

   • A.At high altitude
   • B.Within approximately one wingspan of the surface
   • C.In a steep climb
   • D.Above pattern altitude
   Show answer & explanation

   Answer: B. Within approximately one wingspan of the surface

   Ground effect occurs within about one wingspan of the surface; reduced induced drag can allow a premature takeoff that then fails to sustain climb.

5. Question 5

   Which of the following is NOT one of the four left-turning tendencies of a single-engine propeller airplane?

   • A.Torque
   • B.P-factor
   • C.Gyroscopic precession
   • D.Adverse yaw
   Show answer & explanation

   Answer: D. Adverse yaw

   The four left-turning tendencies are torque, P-factor, spiraling slipstream, and gyroscopic precession. Adverse yaw is a rolling-to-yaw coupling from differential aileron drag — a separate phenomenon.

48 more Aerodynamics & Systems questions are in the app, along with explanations and flashcards for every one.

Airworthy is an independent study aid based on the FAA Airman Certification Standards for the Private Pilot — Airplane knowledge test. It is not affiliated with, endorsed by, or sponsored by the FAA or any government agency.