Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70F and the relative humidity is 50%, what is the absolute 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 dry bulb temperature is 70F and the relative humidity is 50%, what is the absolute humidity? GS-RA-22

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

Accepted Answer

Option B: 45 grains of moisture per pound of dry air. Using a standard psychrometric chart, locate the intersection of the 70F dry-bulb temperature line and the 50% relative humidity curve. Moving horizontally to the right axis reveals the absolute humidity, which represents the moisture content in grains per pound of dry air, yielding a value of 45 grains.