Question

Heating of air, without any change in its specific humidity is known as:

• A. Humidification
• B. Sensible cooling
• C. Sensible heating
• D. Dehumidification

Hint:

Sensible heating changes only the air’s temperature — not its moisture content!

Answer 1

The Correct Option is C

When air is heated and its temperature increases without any change in its moisture content, it is called sensible heating.
In sensible heating, only the dry bulb temperature of the air rises, but the specific humidity (amount of water vapor per kg of dry air) remains constant.
This process occurs in applications like heating systems and air conditioning during winter.
Humidification adds moisture to the air.
Sensible cooling removes heat without changing humidity but in the opposite direction — cooling instead of heating.
Dehumidification reduces the moisture content.
Therefore, heating air without changing its specific humidity is correctly called sensible heating.