Residential HVAC Installation Practice Exam

What is the role of the conditioned area thermostat in a system?

1. Controls airflow pressure

2. Regulates temperature levels

3. Adjusts the tension on the belt

4. Controls power to the control transformer

The correct answer is: Controls power to the control transformer

The conditioned area thermostat is responsible for controlling the power that goes to the control transformer in a system. This is important because the control transformer is responsible for converting the incoming voltage to a lower and safer voltage, which is then used by other components in the system. Without the thermostat controlling the power to the transformer, there could be potential safety hazards or malfunctions in the system. Options A, B, and C are incorrect because they do not accurately describe the role of the thermostat. Controlling airflow pressure, regulating temperature levels, and adjusting the tension on the belt are all responsibilities of other components in the system, such as the blower motor and the evaporator coil, but not the thermostat.