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

How many electric outflow valves does the CRJ-700/900 have?

1. One

2. Two

3. Three

4. Four

The correct answer is: One

The CRJ-700 and CRJ-900 are equipped with a total of one electric outflow valve. This design choice allows the aircraft to effectively manage cabin pressure during various phases of flight. The single electric outflow valve is an integral part of the pressurization system, ensuring that the cabin maintains a safe and comfortable pressure differential relative to the outside atmosphere. Having one outflow valve simplifies the system, minimizing potential points of failure while still effectively regulating cabin pressure. It's designed to regulate the rate at which air exits the cabin, ensuring that proper pressure is maintained for passenger comfort and safety. In contrast, other designs that might have multiple outflow valves tend to incorporate them for efficiency or redundancy, but in the case of the CRJ-700/900, the single electric outflow valve suffices in meeting the operational requirements of the aircraft.