Dry bulb temperature is defined as?

• A. The humidity ratio in air.
• B. The temperature of air measured by a regular thermometer.
• C. The dew point temperature.
• D. The wet bulb temperature.

Answer: (B)

Dry bulb temperature is the air temperature measured with a regular thermometer. It reflects the sensible heat of the air and does not account for moisture content. The humidity ratio describes how much water vapor is in the air, not its temperature. The dew point is the temperature at which air becomes saturated and condensation begins. The wet-bulb temperature is read with a thermometer covered by a wetted wick and depends on evaporative cooling, which varies with humidity. So, the defining idea is simply the temperature of the air as measured by a standard thermometer.