Minnesota Boiler License Practice Exam

In addition to a safety relief valve, what other safety device should be installed on a hot water boiler?

1. A safety purge valve

2. A low water cut out control

3. Pressure trol

4. All of the answers given

The correct answer is: A low water cut out control

A low water cut out control is essential for the safe operation of a hot water boiler because it serves as a critical safety device that prevents the boiler from operating when there is insufficient water in the system. This control measures the water level and ensures that the boiler does not run dry, which can lead to overheating and possible failure of the boiler components. If the water level drops below a predetermined point, the low water cut out control will automatically shut down the boiler, thereby preventing damage and enhancing safety. While other devices like the safety purge valve and pressure trol also play important roles in boiler operation, they do not address the specific risk associated with low water conditions as directly as the low water cut out control does. Therefore, this control is a fundamental safety feature that should always be included alongside a safety relief valve to provide comprehensive protection for the boiler system.