Ryanair Initial Practice Exam

What does PSU stand for in aviation terms?

1. Passenger Security Unit

2. Passenger Service Unit

3. Passenger Safety Unit

4. Passenger Support Unit

The correct answer is: Passenger Service Unit

The term PSU in aviation stands for Passenger Service Unit. This refers to the components located above the passengers’ seats in an aircraft cabin that provide essential services such as lighting, air flow control, and oxygen masks. The PSU is critical for passenger comfort and safety during the flight. It allows individuals to adjust their personal airflow and ensures that essential emergency equipment, such as oxygen masks, is readily available in the event of cabin depressurization. In contrast, other options like a Passenger Security Unit, Passenger Safety Unit, or Passenger Support Unit do not pertain to a standard aviation term recognized globally, and they don’t encompass the specific functionalities offered by the PSU. Understanding the role of the Passenger Service Unit is vital for grasping how the cabin environment is controlled and maintained for the safety and comfort of all passengers aboard an aircraft.