Which of the following configurations does NOT stop bleed air inflow?

The configuration that does not stop bleed air inflow is activating RAM/DUMP. When the RAM/DUMP mode is activated, it allows the aircraft to utilize ambient air rather than relying on the bleed air system. This mode is designed to dump cabin air pressure or regulate the cabin environment under certain conditions, but it does not specifically close or deactivate the bleed air inflow.

In contrast, placing the BLEED AIR INFLOW switch to OFF effectively stops the inflow of bleed air by shutting off the source, thereby ceasing any contribution from the bleed air system. Adjusting the control valve can also restrict or stop bleed air flow by changing the valve's position, controlling the amount of bleed air entering the system. Opening the fresh air valve facilitates a flow of outside air but does not stop bleed air inflow; instead, it allows for additional ventilation while the bleed air may still be active.