Which of the following is listed as a CPAM-related function?

• A. Opens/closes ground valve
• B. Scans cabin air temperature
• C. Monitors wing ice
• D. Displays flight crew alerts

Answer: (A)

CPAM controls the cabin pneumatic system, managing how air is supplied to and from the cabin and how the pressurization system is coordinated. Opening and closing the ground valve is part of that control, because the ground valve either connects the cabin to the external ground air source or isolates it, enabling on-ground pre-pressurization or testing and preventing unintended air flow when not on the ground. This is exactly the type of valve control CPAM handles to manage how air enters or leaves the cabin.

Scans of cabin air temperature are handled by environmental control and temperature sensing within the ECS, not CPAM. Wing ice monitoring belongs to the ice protection and detection systems, and displaying flight crew alerts is a function of cockpit alerting systems like ECAM/EICAS, not CPAM. So the ground valve control best fits as a CPAM-related function.