Engine 2014: General Subjects

1. A System cooling is the direct result of the freon circuit of a direct type air conditioning unit.
2. B The room thermostat controls the degree of mixing of the cold and hot air at the dual duct air mixing unit.
3. C The submaster thermostat controls the steam flow through the preheat coil and its associated pneumatic control valve.
4. D The heat load will increase by increasing the amount of recirculated air.

Tip: press A-D to answer