PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

At what cabin altitude will passenger oxygen masks deploy according to CRJ systems?

1. 10,000 feet

2. 12,000 feet

3. 14,000 feet

4. 16,000 feet

The correct answer is: 14,000 feet

Passenger oxygen masks on the CRJ systems are designed to deploy automatically when the cabin altitude reaches 14,000 feet. This altitude is significant because it is the threshold at which the risk of hypoxia (a deficiency in the amount of oxygen reaching the tissues) increases for passengers. At altitudes above 14,000 feet, the available oxygen in the atmosphere is not sufficient for normal physiological function without supplemental oxygen. As a safety feature, the CRJ systems have been engineered to activate the passenger oxygen masks to ensure the safety and well-being of those onboard in the event of a sudden loss of cabin pressure. This operational design aligns with aviation regulations that emphasize maintaining a safe environment for passengers at altitude. Therefore, the correct answer reflects the critical altitude at which supplemental oxygen becomes necessary to mitigate health risks for passengers in the cabin.