Which lever is the outermost lever on the ERJ 175 under the lining cover?

The outermost lever on the ERJ 175 under the lining cover is the Lock/vent flap lever. This lever is crucial as it controls the operation of the lock and vent flaps, which are important for maintaining cabin pressure and safety during flight. The positioning of this lever as the outermost makes it accessible for crew members during specific operational scenarios, ensuring efficient handling of cabin systems.

The other options serve different functionalities within the aircraft. The oxygen mask lever is involved in deploying oxygen masks in case of cabin depressurization, while the emergency exit lever is specifically for accessing emergency exits. The galley service lever pertains to operations related to the aircraft’s galley and food service. Each of these levers has its distinct purpose and positioning within the aircraft, but the Lock/vent flap lever is specifically designed to be the outermost for practicality and safety in operational procedures.