What type of control does the cabin pressure control system use to maintain pressure gradients?

The correct answer is automated control. The cabin pressure control system in the Embraer Regional Jets operates primarily through an automated system designed to maintain optimal pressure gradients for passenger comfort and safety during various phases of flight. This automated system efficiently regulates cabin pressure without requiring constant pilot input, allowing the crew to focus on other critical flight operations.

Automated control systems utilize sensors and pre-programmed logic to continuously monitor and adjust cabin pressure dynamically, responding to changes such as altitude variations and aircraft performance. This level of automation helps ensure that the cabin remains pressurized consistently and can adjust quickly to maintain safety and comfort.

While manual control can be employed in certain situations or in case of system malfunction, the primary function of the cabin pressure control system relies on automation to ensure reliability and efficiency throughout different operating conditions.