Question 482General Subjects - Assistant Engineer

70% to pass

Referring to the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature below the dew point temperature, and this results in sensible heat loss and dehumidification. What statement represents the direction of the air conditioning process line? Illustration GS-RA-22

AThe air conditioning process line is diagonal with the coil outlet to the left and below the coil inlet.

BThe air conditioning process line is diagonal with the coil outlet to the right and below the coil inlet.

CSorry, that answer is not correct. The correct answer is (A) The air conditioning process line is diagonal with the coil outlet to the left and below the coil inlet.

DThe air conditioning process line is diagonal with the coil outlet to the right and above the coil inlet.

AI Explanation

The correct answer is A) The air conditioning process line is diagonal with the coil outlet to the left and below the coil inlet. This is correct because when air passes over a cooling coil with a mean surface temperature below the dew point, the air undergoes both sensible heat loss and dehumidification. On the psychrometric chart, this process is represented by a diagonal line moving from the coil inlet condition to the coil outlet condition, with the outlet condition being to the left and below the inlet condition. The other options are incorrect because they do not accurately depict the direction of the air conditioning process line on the psychrometric chart given the conditions described.