Engine: General Subjects

1. A The heat load will increase by increasing the amount of recirculated air.
2. B System cooling is the direct result of the vapor compression refrigerant circuit of a direct air conditioning unit.
3. C The duct thermostat determines the amount of water flow circulating through the cooling coil.
4. D The room thermostat controls the wet bulb temperature of the air-conditioned space.

Tip: press A-D to answer