True or false: The bleed valves are pneumatically operated and electrically controlled.

The statement is true because bleed valves in various aircraft systems are indeed pneumatically operated and under electrical control. This design allows for efficient management of compressed air systems, which play a critical role in engine performance, cabin pressure, and de-icing mechanisms, among other applications.

The pneumatic operation means that the valves rely on air pressure to actuate the opening and closing of the valve itself, enabling airflow from engines or auxiliary power units to be managed effectively. Meanwhile, being electrically controlled provides the ability to automate the operation of these valves based on specific engine conditions or pilot inputs. This combination enhances the system's reliability and efficiency, as it allows for precise control over airflow, optimizing performance and safety.

In many aircraft models, this design is standard; therefore, the answer correctly affirms that the bleed valves function in this way across a significant number of aviation systems.