What PSI is expected to be shown with the RAT extended?

When the Ram Air Turbine (RAT) is extended on the A320, it serves to provide hydraulic pressure to the blue hydraulic system in the event of a complete loss of normal hydraulic power sources. The expected pressure is 2500 psi. This system is designed to function under emergency conditions and ensures that critical flight controls can operate safely even with compromised systems.

The blue hydraulic system is specifically designated to receive hydraulic pressure from the RAT, and the 2500 psi output is consistent with the specifications established for emergency hydraulic operation. This pressure is sufficient to power essential systems and is a crucial factor in maintaining aircraft control during an emergency situation.

The other choices mention incorrect systems or pressures that do not align with the specifications for the RAT's operation, reinforcing that the blue system at 2500 psi is the correct and expected outcome when the RAT is activated.