Referring to the illustrated psychrometric chart, if the measured dry-bulb temperature oo is 80F and the measured wet-bulb temperature is 70F, what is the determined relative humidity? GS-RA-22

Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration.

Question

Referring to the illustrated psychrometric chart, if the measured dry-bulb temperature oo is 80F and the measured wet-bulb temperature is 70F, what is the determined relative humidity? GS-RA-22

Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option B: 60%. Locate the 80F dry-bulb temperature on the horizontal axis and the 70F wet-bulb temperature along the saturation curve. Following the wet-bulb line down to the 80F dry-bulb line, the intersection point falls on the 60% relative humidity curve, providing the accurate moisture saturation level for the given air conditions.