Question 91Refrigeration/AC - Assistant Engineer70% to pass
Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration GS-RA-42
AI Explanation
The correct answer is D) The duct thermostat determines the amount of water flow circulating through the cooling coil.
In a class "D" air conditioning system, the duct thermostat controls the temperature of the air exiting the cooling coil by regulating the amount of water flowing through the coil. This allows the system to maintain the desired temperature in the conditioned space. The other answer choices are incorrect - option A is about recirculated air, which is not directly related to the cooling coil; option B is about wet bulb temperature, which is not the control parameter in this type of system; and option C describes a direct expansion cooling system, which is different from the water-cooled system depicted in the illustration.
Related Questions
#89 A room humidistat initiates the lowering of the humidity of the conditioned supply air to a space, while the actual process is accomplished by what means? #90 To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature and relative humidity in an air conditioning system, what should be done? #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 #93 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 #94 Concerning the arrangement of equipment and associated hoses shown in the illustration, what statement is true? Illustration GS-RA-59