Question 140Refrigeration/AC - 1st Asst/Chief70% 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 at 80 degrees F and 70% relative humidity is 70 degrees F. This can be determined using a psychrometric chart or calculated using the appropriate formula. The air conditioning process does not change the dew point temperature, so the resulting dew point temperature of the conditioned air just before it contacts the cooling coil will also be 70 degrees F.
The other options are incorrect because they do not represent the dew point temperature of the given air conditions. A) 64 degrees F, B) 67 degrees F, and D) 73 degrees F are not the correct dew point temperature for the specified air conditions.
Related Questions
#138 What is the drive arrangement of refrigeration compressor shown in figure "B" of the illustration? Illustration GS-RA-41 #139 A device used to hold open the refrigeration compressor suction valve during starting to reduce the compression load is called what? #141 For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes? #142 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? #143 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