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Psychrometrics: wet-bulb behavior during sensible heating. Process: heat moist air with no moisture addition (specific humidity constant). How does the wet-bulb temperature change during this sensible heating process? Choose the correct trend.

Difficulty: Easy

Correct Answer: increases

Explanation:

Given
Sensible heating ⇒ dry-bulb temperature rises, humidity ratio remains (approximately) constant.


Concept
On a psychrometric chart, at constant humidity ratio, moving to higher dry-bulb generally increases enthalpy and wet-bulb temperature. Relative humidity decreases.


Conclusions
Wet-bulb temperature increases during sensible heating.


Final Answer
increases.

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