What is one of the components some galleys may contain?

The presence of a water shut-off valve in some galley designs is integral to aircraft operations. This component is utilized to control the water supply for the galley, enabling crew members to manage water access efficiently during food and beverage service. It plays a crucial role in ensuring that the galley can function effectively while also allowing for safety measures to prevent leaks or misuse of water systems.

In contrast, oxygen masks are generally found in the passenger cabin or overhead compartments for use in emergencies and are not typically a feature of the galley. Emergency exits are located at strategic points around the aircraft for passenger evacuation and are not contained within the galley area. Security alarms are also not relevant to galley operations, as they pertain more to overall aircraft security rather than the specific function of food and beverage service areas.