Commercial Pilot License (CPL) Practice Exam 2025 - Free Commercial Pilot License Practice Questions and Study Guide

Question: 1 / 550

At what altitude must pilots use oxygen when carrying passengers for hire after 30 minutes?

8,000 feet

10,000 feet

When operating at altitudes above 10,000 feet, the regulations state that pilots must provide supplemental oxygen for passengers if they will be at that altitude for more than 30 minutes. This requirement is based on physiological factors related to the decreasing availability of oxygen as altitude increases, which can impair cognitive function and lead to hypoxia.

At 10,000 feet, the partial pressure of oxygen decreases significantly, and extended exposure can lead to a risk of hypoxia for those not acclimatized or without supplemental oxygen. Therefore, the cutoff point at which oxygen must be provided for passengers aligns with the regulations in aviation safety standards, ensuring passenger safety during flight operations.

It’s important to note that while oxygen use is recommended at lower altitudes, the specific threshold at which it becomes obligatory for passenger safety is 10,000 feet, making this the correct answer.

Get further explanation with Examzify DeepDiveBeta

12,500 feet

15,000 feet

Next Question

Report this question

Download Commercial Pilot License (CPL) Practice Exam 2025 - Free Commercial Pilot License Practice Questions and Study Guide PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy