Using the psychrometric chart, what will the wetbulb temperature be if the drybulb is 80 degrees and the humidity is 30%?

To determine the wet bulb temperature using a psychrometric chart, we start with the known variables: a dry bulb temperature of 80 degrees Fahrenheit and a relative humidity of 30%.

The wet bulb temperature is always less than or equal to the dry bulb temperature, as it represents the lowest temperature a parcel of air can achieve through evaporation. In this case, with the dry bulb set at 80 degrees and relatively low humidity, the wet bulb can't be at the same temperature since that would indicate 100% relative humidity.

Consulting the psychrometric chart with these values reveals that a dry bulb temperature of 80 degrees and a relative humidity of 30% corresponds to a wet bulb temperature of around 60 degrees Fahrenheit. This reflects the combined effects of temperature and moisture content in the air, confirming that with higher temperatures and lower humidity, the wet bulb temperature is substantially lower than the dry bulb temperature.

This reasoning based on the relationship of dry bulb temperature, wet bulb temperature, and relative humidity leads us confidently to the conclusion that the wet bulb temperature is accurately represented by the choice indicating 60 degrees Fahrenheit.