Final answer:
The internal temperature range for a keg cooler should be maintained between 0°C to 7°C (32°F to 45°F) to inhibit microbial growth and preserve the quality and safety of beverages.
Step-by-step explanation:
The internal temperature of the keg cooler should be maintained within the range of 0°C to 7°C (32°F to 45°F).
This temperature range is commonly used for refrigeration purposes to inhibit microbial growth and slow down the metabolism of microorganisms, thus preserving refrigerated products such as food and medical supplies.
A keg cooler is designed to keep beverages cold, and maintaining temperatures within this range ensures the quality and safety of the beverages stored in the cooler.