Question 93Refrigeration & AC - Assistant Engineer

The correct answer is C) 70 degrees F. The dew point temperature of air is the temperature at which the air becomes saturated with water vapor, and any further cooling will result in condensation. Given the outside air conditions of 80 degrees F and 70% relative humidity, using a psychrometric chart or calculator, the dew point temperature of the air before it enters the cooling coil is 70 degrees F. The other options are incorrect because 64 degrees F (A) is too low, 67 degrees F (B) is too low, and 73 degrees F (D) is too high compared to the correct dew point temperature of 70 degrees F.