Ontario Food Handler Certification Practice Exam

Which method is NOT considered safe for thawing food?

1. In the refrigerator

2. Under cold running water

3. In the microwave

4. At room temperature

The correct answer is: At room temperature

Thawing food safely is crucial in preventing foodborne illnesses. Thawing at room temperature is not considered safe because it allows the exterior of the food to reach temperatures where bacteria can multiply rapidly, while the interior of the food may still be frozen. This temperature range, typically between 4°C (40°F) and 60°C (140°F), is often referred to as the "danger zone." In contrast, the other methods are effective because they maintain a safe temperature throughout the process. Thawing in the refrigerator keeps the food at a consistent, safe temperature, minimizing the risk of bacteria growth. Thawing under cold running water also ensures a safe temperature by swiftly moving the food through the danger zone. Using a microwave is safe as well, provided the food is cooked immediately after thawing, as microwaves can cause uneven heating which may leave parts of the food at unsafe temperatures for bacteria to proliferate. Understanding safe thawing methods helps ensure that food remains safe to eat and significantly reduces the risk of foodborne illnesses.