Question

Freshly cooked hot food is transferred from the cooking pot to an ordinary porcelain bowl. Which mode of heat transfer is/are predominant to cool down the food?

• A. Convection only
• B. Conduction and convection
• C. Convection and radiation
• D. Radiation only

Answer 1

The correct option is A Convection only

There are three modes of heat transfer. They are:

1. Conduction
2. Convection
3. Radiation

In this case, the food is stored in a porcelain bowl, which is a bad conductor of heat. So, the modes of heat transfer that are possible will be convection and radiation. Since radiation is very slow, convection is the predominant mode of heat transfer, letting the food cool down.