Which control is used with the emergency pack?

The AMSAC control is specifically designed to interface with the emergency pack in the Dassault Falcon 7X. This control coordinates the activation and management of the emergency oxygen system, ensuring that crew and passengers can access supplemental oxygen in case of cabin depressurization or other emergencies. The AMSAC (Automatic Mask System Activation Control) enhances safety by allowing for an automatic deployment of oxygen masks and ensuring their readiness when needed, which is critical for passenger safety in emergency situations.

In the context of the other options, the AMSEC control relates more to security systems rather than emergency oxygen management. Engine controls are primarily focused on the operation and management of the aircraft's engines and do not apply to the emergency systems. The term "Backup Control" may imply redundancy systems in various functions, but it does not directly address the specific needs of the emergency oxygen system, which is governed by the AMSAC control.