Engine: Refrigeration AC

1. A The space air temperature is controlled by automatically proportioning the cold and hot air streams at the mixing unit.
2. B The space air temperature is controlled by automatically controlling the steam flow through the preheat coil.
3. C The space air temperature is controlled by automatically controlling the chilled water flow through the cooling coil.
4. D The space air temperature is controlled by automatically controlling the steam flow through the reheat coil.

Tip: press A-D to answer