Question 221General Subjects - 1st Asst/Chief

The correct answer is B) The air conditioning process line is horizontal with the coil outlet to the left of the coil inlet. This is because when air passes over a cooling coil with a mean surface temperature above the dew point temperature, the air experiences sensible heat loss without a change in moisture content. On the psychrometric chart, this results in a horizontal process line moving to the left, as the dry-bulb temperature decreases while the humidity ratio remains constant. The other options are incorrect because they do not accurately represent the direction of the air conditioning process line under the given conditions. A vertical process line (options C and D) would indicate a change in moisture content, which is not the case here.