Gas Fitter Practice Test

If a 24 volt transformer for a power humidifier is wired in series with the humidistat and the humidifier motor, what will happen?

1. The humidifier motor will burn out

2. The humidifier motor will not be energized

3. The humidifier motor will operate properly

4. The humidifier motor will run at half speed

The correct answer is: The humidifier motor will operate properly

The scenario describes a 24 volt transformer wired in series with the humidistat and the humidifier motor. In this configuration, when the humidistat is activated (meaning it detects a need for humidity in the air), it completes the circuit, allowing current to flow from the transformer to the humidifier motor. When the humidistat closes, it provides a direct path for the electrical current, enabling the 24 volt transformer to supply power to the humidifier motor. As a result, the motor receives the necessary voltage to operate. Since the components are properly configured in a series circuit and the transformer is designed to deliver the required voltage, the humidifier motor will function as intended, running properly under normal operating conditions. This means that the humidifier will effectively add moisture to the air when the system is activated, fulfilling its purpose without any risk of malfunction or damage, assuming all components are in good working condition.