Which system requires a 15-minute heat-up time in the CRJ 200?

The galley heating system in the CRJ 200 necessitates a 15-minute heat-up time to ensure that it reaches the appropriate temperature for food preparation and service. This time allows the system to properly preheat, facilitating effective operation. The galley includes equipment that often requires time to warm up to function optimally, which is particularly important during flight operations where efficiency and safety are paramount.

Understanding the heating requirements of the galley system is essential for cabin crew members, as it affects meal service timing and the overall passenger experience. While the other systems mentioned play vital roles in aircraft operation and passenger comfort, they do not share the same requirement for a preheating period. For instance, the passenger cabin heat is regulated more dynamically depending on real-time conditions, and the potable water system is pressurized as needed without a specific heat-up time. The oxygen system is also fundamentally different in its operation, focusing on providing safety rather than preparing for service. Thus, recognizing the unique operational characteristics of the galley heating system is essential in differentiating it from the other options provided.