In hot weather ventilators are often used to normalize the microclimate in the heated rooms. It leads to intensified heat transfer from the human body by means of:

Answer options

1. Convection
2. Evaporation
3. Conduction
4. Conduction and convection
5. Radiation

Explanation

Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it. Convection above a hot surface occurs because warm air expands, becomes less dense, and rises (see Ideal Gas Law).