What is the primary purpose of the AOA test?

The primary purpose of the Angle of Attack (AOA) test is to ensure that stall warning systems function correctly. The AOA measurement is crucial for determining the relationship between the aircraft's wing and the airflow around it, which is instrumental in predicting and warning against a stall condition. During flight, maintaining an appropriate angle of attack is essential for ensuring safe operation, as exceeding the critical angle can lead to a stall.

By testing the AOA, pilots and engineers can confirm that the stall warning systems activate at the right time, giving pilots the necessary alerts to take corrective actions before encountering a stall. This is essential for flight safety and ensures that the aircraft remains within its operational limits.

The other options do not align with the primary purpose of the AOA test. Climb rate measurement, engine response assessment, and fuel efficiency determination are all important factors in aviation, but they are separate from the specific function and application of the AOA system in relation to stall warnings.