Final answer:
After beverage service in the main cabin, trays and trash are cleared. Every 30 minutes, cabin checks and refresher services are conducted.
Step-by-step explanation:
In the main cabin service, beverage service is followed by clearing of trays and trash collection. This involves picking up any remaining food trays, cups, napkins, and other items used during the beverage service. Additionally, the cabin crew may also go around the cabin to collect any leftover trash from passengers who have finished their meal or consumed their beverages.
As for the every 30-minute intervals, a common practice in the airline industry is to conduct cabin checks and refresher services. This involves checking the overall cleanliness of the cabin, tidying up the lavatories, restocking supplies such as toilet paper and hand towels, and refreshing the cabin environment by adjusting lighting, temperature, and air circulation.