PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

Above what altitude is the use of slats and flaps prohibited?

1. 10,000 feet

2. 12,500 feet

3. 15,000 feet

4. 20,000 feet

The correct answer is: 15,000 feet

The correct altitude above which the use of slats and flaps is prohibited is 15,000 feet. This limitation is based on aerodynamic considerations to ensure safe and efficient flight operation in the different phases of flight. The flap and slat systems are designed to enhance lift at lower speeds during takeoff and landing. Operating these devices at higher altitudes can result in aerodynamic risks, such as diminished control and stability, which is critical as the aircraft is generally within a cruising configuration above this altitude. The restriction is established to enhance safety measures, ensuring that the aircraft is operating within its performance limits under various flight conditions. This practice helps to maintain optimal flying characteristics, particularly as air density decreases with altitude, affecting lift and handling of the aircraft. Understanding these operational parameters is crucial for pilots to make informed decisions during their flight operations.