What additional safety feature does a float-operated low water cut off provide along with stopping combustion?

A float-operated low water cut-off is an essential safety device used in boilers to prevent unsafe operating conditions. Its primary function is to detect low water levels in the boiler and stop the combustion process when the water drops below a safe level. This mechanism is vital because operating a boiler with insufficient water can lead to overheating and possible damage or catastrophic failure.

In addition to stopping combustion, this safety feature is designed to alert operators to the condition of the water level in the boiler. Sounding an alarm serves as an important warning signal, notifying personnel of the low water condition so that they can take appropriate action. This alert system enhances safety by providing timely information, which is crucial for maintaining safe operations and preventing accidents.

While other safety features mentioned, such as emergency pressure release or adjustments to the fuel supply line, may contribute to overall boiler safety, they do not provide the immediate feedback about water levels that an alarm does. The focus of the float-operated low water cut-off is primarily on preventing low water situations and ensuring that operators are promptly informed, which is why the alarm feature is a critical additional safety measure.