The measurement of air temperature excluding radiant temperature, measured in shade using a thermometer, is called what?

• A. Measured with a Hygrometer
• B. Measured Using a Thermometer
• C. Measured with a Psychrometer
• D. Measured with a Barometer

Answer: (B)

This is about dry-bulb (air) temperature—the actual temperature of the surrounding air, measured with a thermometer in shade so radiant heat from the sun or hot surfaces doesn’t bias the reading. In practice, you shield the thermometer from radiation and read ta, the air temperature, rather than a radiant temperature reading. The method described matches using a thermometer, which is exactly how you obtain this air temperature.

Hygrometers measure humidity, and a psychrometer uses dry-bulb and wet-bulb readings to infer humidity, while a barometer measures atmospheric pressure. Radiant temperature, which accounts for heat from radiation, is typically measured with a globe thermometer, not a standard thermometer in shade.