Question 93Refrigeration/AC - Assistant Engineer70% to pass
If outside air at 80 degrees F and 70 percent relative humidity is conditioned, what will be the resulting dew point temperature of the air just before it comes into contact with the cooling coil? Illustration GS-RA-22
AI Explanation
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.
Related Questions
#91 Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration GS-RA-42 #92 Which of the following is true concerning the class "A" air conditioning system shown in the illustration as used to condition the air of large public spaces? Illustration GS-RA-09 #94 Concerning the arrangement of equipment and associated hoses shown in the illustration, what statement is true? Illustration GS-RA-59 #95 Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system? #96 Which of the following methods is normally used to control the circulated air temperature of an air conditioning system using chilled water circulation?