Machine-translated by Google. Questions are authored in English.
Top

Discussion

Match the following psychrometric processes (Column I) with the respective changes in thermodynamic properties (Column II) of air-water vapor mixture:

Column IColumn II
1Sensible coolingPDry bulb temperature increases and dew point temperature decreases
2Cooling and dehumidificationQDry bulb temperature increases and dew point temperature increases
3Chemical dehumidificationRDry bulb temperature decreases and dew point temperature remains constant
4Heating and humidificationSDry bulb temperature decreases and dew point temperature decreases

  • A.1-R, 2-S, 3-Q, 4-P
  • B.1-P, 2-R, 3-S, 4-Q
  • C.1-R, 2-S, 3-P, 4-Q
  • D.1-P, 2-Q, 3-S, 4-R

Answer: C

The correct matching is 1-R, 2-S, 3-P, 4-Q.

Dew point temperature depends only on the moisture content (humidity ratio) of the air, so it moves with moisture, while the dry bulb temperature follows heating or cooling.

  1. Sensible cooling removes heat at constant moisture, so dry bulb falls and dew point stays constant: R.
  2. Cooling and dehumidification lowers the temperature and condenses moisture out, so both fall: S.
  3. Chemical dehumidification by an adsorbent removes moisture and releases the heat of adsorption, so dew point falls while dry bulb rises: P.
  4. Heating and humidification adds both heat and moisture, so both rise: Q.

The first option swaps the pairings for chemical dehumidification and heating with humidification. The second and fourth options pair sensible cooling with a rising dry bulb temperature, which is impossible for a cooling process.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.

Subject Categories

Examination Categories

About Us

ExamsRepo

Copyright © 2026 ExamsRepo . All Rights Reserved . With