Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70oF and the relative humidity is 40%, what is the absolute humidity? Illustration 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 70oF and the relative humidity is 40%, what is the absolute humidity? Illustration 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. Psychrometric chart analysis for 70°F dry-bulb and 40% relative humidity intersects horizontally to yield an absolute humidity value of approximately 45 grains per pound.