Minnesota Special Engineer Boiler License Practice Exam 2025 - Free Boiler License Practice Questions and Study Guide

The operator control on a hot water boiler is designed to monitor and respond to temperature changes within the system. When the temperature decreases, this control will typically activate additional heating elements or mechanisms to bring the temperature back up to the set point. This process is crucial for maintaining the efficiency and functionality of the boiler.

The function of starting the heating process is essential to ensure that the hot water supply meets the demands of the system it serves. If the temperature drops below a certain level, the operator control acts automatically or can be manually adjusted to engage the heating elements to begin warming the water again. This response not only supports comfort and efficiency but also helps prevent potential system issues that could arise from insufficient heating.

Other options like stopping or maintaining would not effectively address a drop in temperature, as they do not initiate any action to restore the required heat levels. Similarly, cooling is not a function associated with the operator control in this context, as it contradicts the purpose of the boiler system. Therefore, acknowledging the role of the operator in starting the heating process when a decrease in temperature occurs is fundamental to understanding boiler operation.