What is one role of the pitot-static system?

• A. To generate electrical power
• B. To measure airspeed and altitude
• C. To control engine thrust
• D. To supply bleed air for the APU

Answer: (B)

The pitot-static system is essential for measuring airspeed and altitude in aircraft. This system utilizes two critical components: the pitot tube and static ports. The pitot tube captures dynamic air pressure, which varies with the aircraft's speed, while the static ports measure static pressure, which changes based on altitude. By processing the difference between these pressures, the system calculates airspeed and helps determine the aircraft's altitude relative to sea level. This information is vital for the pilot to maintain safe and efficient flight operations, as it directly influences navigation and flight control decisions.

Given this context, the other choices do not accurately represent the function of the pitot-static system. Generating electrical power, controlling engine thrust, and supplying bleed air for the APU are roles related to different aircraft systems and components, which do not pertain to the operation of the pitot-static system.