Final answer:
The maximum altitude at which a continuous-flow oxygen system can provide sufficient oxygen depends on the aircraft and system design; commercial airliners cruise at 35,000 to 45,000 feet with a pressurized cabin equivalent to 6,000 to 8,000 feet.
Step-by-step explanation:
The continuous-flow oxygen system is designed to provide sufficient oxygen for aviators and passengers during flights. The maximum altitude for such a system depends on the aircraft and the design of the oxygen system, but is generally effective up to altitudes where the partial pressure of oxygen is adequate to maintain sufficient blood oxygen saturation.
While commercial airliners typically cruise at altitudes up to about 35,000 to 45,000 feet and are pressurised to maintain a cabin altitude of roughly 6,000 to 8,000 feet, supplemental oxygen is available and necessary in the event of cabin depressurization at high altitudes. The specific maximum altitude for a continuous-flow oxygen system is not provided here, but it's essential to understand that these systems are part of critical safety equipment on aircraft ensuring passengers and crew avoid hypoxia.