Question 469General Subjects - Assistant Engineer70% to pass
In the illustrated single zone HVAC system, what statement represents the relationship between the exhaust, outside air and recirculation dampers? Illustration GS-RA-09
AI Explanation
The correct answer is A. The more the exhaust and outside air dampers are open, the more the recirculation damper is closed, and vice versa.
This relationship is due to the way the single zone HVAC system is designed to operate. The system needs to maintain a constant airflow, so as more outside air is brought in through the open outside air damper, less recirculated air is needed, causing the recirculation damper to close. Conversely, when the exhaust damper is open, more recirculated air is required, so the recirculation damper opens.
The other options are incorrect because they do not accurately describe the relationships between the damper positions in a single zone HVAC system.
Related Questions
#467 In the illustrated single zone HVAC system, what prevents the simultaneous flow of steam through the preheat coil and flow of chilled water through the cooling coil? Illustration GS-RA-09 #468 In the illustrated single zone HVAC system, what statement represents the functioning of the diverting relay as it controls the cooling coil flow and 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 #471 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the summer 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