What is likely to happen if the cabin exceeds the CPCS limit of 10,000 feet without intervention?

The correct answer identifies that if the cabin altitude exceeds the Cabin Pressure Control System (CPCS) limit of 10,000 feet without intervention, the Outflow Valve will close. This is a safety feature designed to prevent the cabin from exceeding safe altitude thresholds, which could lead to hypoxia and other safety issues for passengers and crew.

As the Outflow Valve closes, it helps to maintain cabin pressure by restricting the outflow of air, essentially acting to trap the air in the cabin and prevent further altitude increase. The system is engineered to automatically protect against scenarios that could compromise cabin safety, and it serves to stabilize the environment within the aircraft up to certain limits, ensuring that the pressurization remains at a safe level.

In contrast, the other options present scenarios that do not accurately reflect what happens under these conditions. For instance, cabin oxygen masks deploying would typically occur as a reaction to a cabin decompression rather than just exceeding the altitude limit without intervention. Pilot authority to override settings does not apply in this context because the automatic safety mechanisms are designed to take precedence for safety reasons. While the pressure may stabilize under certain conditions, this isn't a direct action taken by the control systems in the event of the CPCS limit being breached.