Question 471General Subjects - Assistant Engineer

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.