Question 217General Subjects - 1st Asst/Chief70% to pass
Referring to the illustrated single zone HVAC system diagram, what statement is true concerning the damper controls? Illustration GS-RA-09
AI Explanation
The correct answer is B.
The exhaust and outside air dampers are normally closed, and the recirculation damper is normally open. This allows the system to primarily recirculate air within the building, minimizing the need for outside air. All three dampers are controlled by a single pilot air signal, which means they move in unison based on the control system's needs.
The other options are incorrect because they do not accurately describe the normal positions of the dampers or the control method. Option A has the dampers in the wrong normal positions, and option C and D have each damper controlled by its own pilot air signal, which is not the case in this single zone HVAC system diagram.
Related Questions
#215 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the summer outside air duct thermostat? Illustration GS-RA-42 #216 Referring to the illustrated dual duct multiple zone HVAC system, how is the space temperature directly controlled? Illustration GS-RA-43 #219 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 #220 Referring to the illustrated psychrometric chart, under what conditions are the dry bulb, wet bulb, and dew point temperatures for air all equal in value? Illustration GS-RA-22 #221 Referring to the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature above the dew point temperature, and this results in sensible heat loss with no change in moisture content. What statement represents the direction of the air conditioning process line? Illustration GS-RA-22