Each hydraulic system is powered by how many hydraulic pumps?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

Each hydraulic system on the CRJ550 is equipped with two hydraulic pumps. This design enhances system reliability and redundancy. In the event that one pump fails or is taken offline for maintenance, the second pump can still provide adequate hydraulic pressure to maintain system function. This redundancy is critical in aviation, where safety and reliability are paramount.

Having two pumps also allows for better distribution of hydraulic load, ensures more consistent pressure, and can facilitate more efficient operation under varying flight conditions. In most hydraulic systems in commercial aircraft, this dual-pump setup is a standard practice, providing peace of mind for pilots and maintenance crews alike.