Discussion
Air at \( 60 \) degrees dry bulb and \( 32 \) degrees wet bulb has a wet bulb depression of
Answer: B
Correct answer: 28 degrees
The wet bulb depression is simply the difference between the two readings:
\[ \Delta T = 60 - 32 = 28\ \mathrm{degrees} \]
A large depression means rapid evaporation from the wet wick, which means the air is far from saturation and has high drying potential. A depression of zero would mean saturated air, in which no drying could occur at all. The dry and wet bulb pair is what fixes every other psychrometric property on the chart.
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