Wendys Training Practice Test

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What temperature do infrared thermometers measure?

Air
Liquid
Solid
Surface

The correct answer is: Surface

Infrared thermometers are designed to measure the temperature of surfaces by detecting the infrared radiation emitted from them. These devices capture the energy emitted by materials and convert it into a temperature reading without direct contact. This is particularly useful in various settings, including kitchens, where measuring the surface temperature of food items can ensure safety and quality. While air, liquid, and solid can all have temperatures, infrared thermometers specifically focus on the outermost layer of an object, which is why the surface temperature measurement is most accurate and relevant for their intended use. Understanding the primary function of infrared thermometers helps clarify why surface measurements are emphasized.