Question 471General Subjects - Assistant Engineer70% to pass
In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the summer outside air duct thermostat? Illustration GS-RA-42
AI Explanation
The correct answer is A.
During the cooling season, the summer thermostat senses the outside air temperature and closes the exhaust and outside air dampers when the outside air temperature is significantly higher than typical indoor air temperatures. This allows the system to minimize the introduction of hot outside air, which would increase the cooling load and reduce the efficiency of the cooling system.
The other options are incorrect because they either describe the wrong sensor (inside air temperature instead of outside air temperature) or the wrong damper response (opening instead of closing the dampers). The key is that the summer thermostat is designed to sense the outside air temperature and close the dampers when it is hot outside to maintain efficient cooling operation.
Related Questions
#469 In the illustrated single zone HVAC system, what statement represents the relationship between the exhaust, outside air and recirculation dampers? Illustration GS-RA-09 #470 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the winter outside air duct thermostat? Illustration GS-RA-42 #472 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the supply air duct thermostats controlling the preheater steam flow and the cooling coil chilled water flow? Illustration GS-RA-42 #473 Referring to the illustrated single zone HVAC system diagram, what statement is true concerning the damper controls? Illustration GS-RA-09 #474 Referring to the illustrated dual duct multiple zone HVAC system, how is the space temperature directly controlled? Illustration GS-RA-43