AAA Food Manager Certification Practice Test

What is the correct temperature reading when calibrating a thermometer using the ice point method?

1. 0 degrees Celsius

2. 32 degrees Fahrenheit

3. 100 degrees Celsius

4. 212 degrees Fahrenheit

The correct answer is: 32 degrees Fahrenheit

The ice point method for calibrating a thermometer involves using the freezing point of water, where ice and liquid water coexist. At standard atmospheric pressure, this freezing point occurs at 0 degrees Celsius. However, when converting this measurement to Fahrenheit, the corresponding temperature is 32 degrees Fahrenheit. This method is fundamental because it ensures that the thermometer provides accurate readings in a reliable reference state. The ice point can be created by filling a container with crushed ice and adding just enough water to form a slurry, ensuring that the thermometer's bulb is submerged in this mixture for an accurate reading. Achieving this 32 degrees Fahrenheit reading confirms that the thermometer is calibrated properly and will deliver accurate measurements in practical applications involving food safety and preparation. The other temperature readings represent different physical states or boiling points rather than the freezing point, which is why they are not applicable for this calibration method.