Question

The amount of moisture in the air expressed in percentage of the amount of saturation at the same temperature is called .

• A. absolute humidity
• B. relative humidity
• C. mild humidity

Answer 1

The correct option is B relative humidity

Relative humidity is the amount of water vapour or moisture expressed as a percentage of the amount needed for saturation i.e. the maximum amount of water vapour the air can hold at the same temperature. For example, if one cubic metre of air can hold 25g of water at ${28}^{\circ }C$, and the actual mositure content is 20g at ${28}^{\circ }C$, then the relative humidity is 80 percent.