Referring to the illustrated psychrometric...

Referring to the illustrated psychrometric...

Question 1 of 2921866636eee28f7522a1c51f124

Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70°F and the relative humidity is 40%, what is the absolute humidity? Illustration RA-0022

Question 1 of 29218

Q

Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70°F and the relative humidity is 40%, what is the absolute humidity? Illustration RA-0022

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🔍 Key Concepts

• Locate the dry bulb temperature of 70°F on the bottom horizontal axis and move vertically up from that point. • From where 70°F lines up, follow the curve for 40% relative humidity until they intersect. • From that intersection, project horizontally to the right-hand grains of moisture scale to read the absolute humidity in grains per pound of dry air.

💭 Think About

• How do the constant relative humidity curves run across this chart, and which one corresponds to 40%? • Once you find the intersection of 70°F dry bulb and 40% relative humidity, which direction must you move to read grains of moisture per pound of dry air? • Compare the value you read on the grains scale with the four answer choices— which one is closest to the point you found on the chart?

✅ Before You Answer

• Be sure you are on the 70°F dry bulb line, not 75°F or 65°F. • Confirm you are following the correct 40% relative humidity curve, not the 30% or 50% curve next to it. • Double-check that you read from the right-hand vertical scale labeled grains of moisture, not the percent relative humidity scale at the top.