Answer :
Final answer:
Technicians in the field of air conditioning and refrigeration commonly use the Fahrenheit and Celsius temperature scales, with Fahrenheit being prevalent in the U.S. and Celsius used internationally and in scientific contexts.
Explanation:
Two common temperature scales used by air conditioning and refrigeration technicians are called Fahrenheit and Celsius. These are part of the three main temperature scales, which also include Kelvin. In most scientific contexts, Celsius and Kelvin are the preferred scales. However, in the United States, the Fahrenheit scale is more commonly used for everyday purposes such as weather forecasts, cooking, and medical applications. Refrigeration and air conditioning technicians often use Fahrenheit due to its prevalence in the U.S., while also needing to understand Celsius for scientific readings and international applications.