Utah Food Safety Practice Test

Which thermometer type provides the quickest reading of temperature in food items?

1. Bimetal thermometer

2. Infrared thermometer

3. Thermocouple thermometer

4. Mercury thermometer

The correct answer is: Thermocouple thermometer

The thermocouple thermometer is the fastest among the given choices for obtaining temperature readings in food items. This type of thermometer features two metal wires joined at one end, creating a junction that can quickly respond to changes in temperature. Due to its design, the thermocouple can provide temperature readings in mere seconds, making it ideal for cooking or food service situations where time efficiency is critical. In contrast, a bimetal thermometer takes longer to equalize the temperature as it relies on the expansion and contraction of metal to gauge heat, making it slower than a thermocouple. While infrared thermometers offer quick surface temperature readings, they cannot penetrate food items to measure internal temperature accurately, which is essential for food safety. The mercury thermometer, though historically used, is not recommended due to safety concerns and also takes longer to provide an accurate reading. Thus, the thermocouple thermometer stands out as the best option for rapid temperature measurements in food.