Officer Aptitude Rating (OAR) Practice Test

Question: 1 / 400

Why might you need supplemental oxygen when flying above 10,000 feet?

Decreased air pressure

When flying above 10,000 feet, the primary reason for needing supplemental oxygen is due to decreased air pressure. At higher altitudes, the atmospheric pressure drops, which leads to a reduction in the amount of oxygen available in the air. This phenomenon occurs because the air becomes thinner, meaning that while the percentage of oxygen in the atmosphere remains constant, the overall density of air molecules—including oxygen—decreases. As a result, individuals may not receive adequate oxygen to meet the body's physiological demands, particularly during physical activity or prolonged exposure to high altitudes. Supplemental oxygen compensates for this reduced availability, preventing hypoxia, which can occur due to insufficient oxygen intake.

Get further explanation with Examzify DeepDiveBeta

High temperatures at altitude

Increased humidity

Low humidity

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy