| 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? See Illustration GS-RA-09 |
| A) The supply air duct thermostat controlling the steam flow is set several degrees lower than the design off-coil temperature associated with the cooling coil. |
| B) The supply air duct thermostat controlling the steam flow is set equal to the design off-coil temperature associated with the cooling coil. |
| C) Simultaneous steam flow through the preheater and chilled water flow through the cooling coil is permitted for the purposes of space humidity control. |
| D) The supply air duct thermostat controlling the steam flow is set several degrees higher than the design off-coil temperature associated with the cooling coil. |
