On the emergency oxygen walk around bottle, which selector knob setting supplies oxygen only on demand at all altitudes up to 30,000 feet?

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Multiple Choice

On the emergency oxygen walk around bottle, which selector knob setting supplies oxygen only on demand at all altitudes up to 30,000 feet?

Explanation:
The setting being tested is the ON DEMAND option, which is designed to deliver oxygen only when you inhale. This uses a demand valve that senses your breath and releases oxygen during inhalation, staying off when you’re not taking a breath. That on-demand behavior helps conserve the bottle’s oxygen and remains effective up to the altitude limit of 30,000 feet as specified for the system. Other settings are not on-demand in the same way: one provides continuous flow regardless of breathing, and another delivers oxygen in metered pulses rather than strictly on inhalation.

The setting being tested is the ON DEMAND option, which is designed to deliver oxygen only when you inhale. This uses a demand valve that senses your breath and releases oxygen during inhalation, staying off when you’re not taking a breath. That on-demand behavior helps conserve the bottle’s oxygen and remains effective up to the altitude limit of 30,000 feet as specified for the system.

Other settings are not on-demand in the same way: one provides continuous flow regardless of breathing, and another delivers oxygen in metered pulses rather than strictly on inhalation.

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