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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:

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

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

ConclusionsWet-bulb temperature increases during sensible heating.

Final Answerincreases.

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