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

During single engine taxiing, which hydraulic pumps are operational in normal conditions?

1. Only pump 1A

2. Pumps 2A and 3B

3. 2A and all the B pumps (and 3A)

4. Only all B pumps

The correct answer is: 2A and all the B pumps (and 3A)

In the context of the Canadair Regional Jet Systems, during single-engine taxiing conditions, it is essential to understand the functioning of hydraulic systems to ensure proper aircraft operation. The correct answer indicates that pumps 2A and all the B pumps (which include 3B) are operational. This configuration is crucial because it allows for adequate hydraulic pressure to power essential systems while minimizing the load on the operating engine. Specifically, pump 2A operates independently to provide hydraulic pressure, while the B pump series (including 3B) also continues to function, ensuring that critical flight control surfaces and landing gear can still be effectively operated even with one engine in use. This setup ensures redundancy and safety, which are vital in maintaining control of the aircraft under such conditions. The operation of both 2A and the B pumps allows the pilots to have a reliable system on hand, which is especially important during taxiing when the risk of requiring prompt response from hydraulic systems is elevated. In summary, the functionality of 2A along with all the B pumps provides the necessary hydraulic power for critical systems during a single-engine taxiing scenario, thereby making this answer the most appropriate choice.