The CREW RATIO knob affects which sections of the aircraft?

The CREW RATIO knob is designed to adjust the environmental control system's settings, specifically in relation to the crew's needs. This function primarily impacts the cockpit area, which is referred to as the LH (Left Hand) and RH (Right Hand) cockpit floor sections. By adjusting this knob, pilots can optimize the air conditioning and ventilation for their specific area, ensuring comfort during flight operations.

The other options are focused on different areas of the aircraft. For instance, the cabin, bathrooms, and galley relate to passenger accommodations and amenities and would not be directly influenced by the CREW RATIO knob aimed at enhancing crew comfort. Similarly, the technical area handles onboard systems and equipment but does not directly overlap with the functions controlled by the CREW RATIO knob. Therefore, understanding this distinction clarifies why the correct answer involves specific sections of the cockpit rather than passenger or technical areas.