Moist air is cooled along the line of constant ________________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs ?
Correct answer: D. Dew point temperature
- A. Enthalpy
- B. Relative humidity
- C. Wet bulb temperature
- D. Dew point temperature
Explanation
Without condensation, cooling removes sensible heat while the humidity ratio remains constant; consequently, the water-vapour partial pressure and dew-point temperature also remain constant. Relative humidity increases as the air cools, so it is not constant.
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