FREE PPL Aeronautical Knowledge Questions and Answers
How does high density altitude affect aircraft performance?
High density altitude means the air is thinner (less dense), which reduces engine power, propeller efficiency, and lift. This can result in longer takeoff rolls and reduced climb performance.
What is the primary purpose of flaps on an aircraft?
Flaps are used to alter the wing's shape, increasing the lift at slower speeds and adding drag to assist in controlled descent during landings. This allows for shorter takeoff and landing distances.
What is the standard atmospheric pressure at sea level?
Standard atmospheric pressure at sea level is defined as 29.92 inches of mercury (1013.25 mb). This is used as a baseline for calibrating altimeters and other pressure-sensitive instruments.
Which of the following is a requirement for Class D airspace?
Class D airspace surrounds smaller airports with an operational control tower. Pilots must establish two-way communication with ATC before entering the airspace, but other equipment like a transponder or ADS-B may not be required.
What is the purpose of the pitot tube?
The pitot tube captures dynamic pressure as the aircraft moves through the air, which is used to calculate airspeed. It's a key component of the pitot-static system.