Which is NOT an example of a pneumatically operated system?

The choice pertaining to aircraft lighting systems is indeed not an example of a pneumatically operated system. Pneumatically operated systems rely on compressed air to perform their functions, which typically include tasks like cabin pressurization and engine starting, as these functions require the force created by air pressure.

In contrast, aircraft lighting systems do not operate on the principle of using compressed air; rather, they typically rely on electrical power sources to illuminate the aircraft. Understanding the distinction between pneumatic and electrical systems is crucial, as this knowledge informs how various aircraft systems are designed and interact. Pneumatic systems are often found in contexts where pressure is used to power mechanical components, while lighting systems primarily utilize electrical circuits and components.