Which of the following are the two types of Oxygen Delivery Systems?

The correct answer identifies the two primary types of oxygen delivery systems used in aviation. Continuous flow systems provide a steady flow of oxygen to the user, which is beneficial for steady altitude operations or when oxygen needs are predictable. Pressure demand systems, on the other hand, deliver oxygen based on the user's breathing, which is particularly useful during high-altitude operations where the risk of hypoxia is greater. These systems are designed to deliver oxygen only when it is needed, optimizing efficiency and ensuring that users receive adequate oxygen during critical times, such as rapid ascent or during high workload conditions.

Understanding these two types is crucial for pilots as they must select the appropriate system based on the flight profile and altitude requirements. Continuous flow is generally simpler and less expensive but becomes less effective at higher altitudes, while pressure demand systems are more complex yet essential when oxygen must be delivered effectively at high altitudes. This knowledge is vital when operating aircraft that could expose crew members to conditions that require supplemental oxygen.