817. Referring to the illustrated psychrometric chart, if the measured dry bulb temperature is 80 °F and the measured wet bulb temperature is 70 °F, what is the determined relative humidity

The psychrometric chart indicates a relative humidity of 0.6 when the dry bulb temperature is 80F and the wet bulb temperature is 70F; this is determined by locating the intersection of the corresponding dry bulb and wet bulb lines on the chart and identifying the intersecting relative humidity curve.