How can you tell if a boiler's safety valve is malfunctioning?

A safety valve is a critical component of a boiler that is designed to release steam and prevent excessive pressure buildup. If the safety valve is functioning properly, it should only open and discharge steam when the pressure exceeds the set limit.

Observing frequent discharge of steam when the boiler is not under demand is a clear indicator of a malfunctioning safety valve. This behavior suggests that the valve is not properly seating or closing, allowing steam to escape without the necessary conditions. Such a situation can lead to significant pressure control issues, posing a safety risk to the operation of the boiler.

The other options address different aspects of boiler maintenance and operation but are not direct indicators of safety valve function. Regularly checking the water level can ensure that the boiler has sufficient water to operate safely, but it doesn't provide insight into the performance of the safety valve. Hearing unusual noises can indicate problems, but these noises could stem from a variety of issues unrelated to the safety valve. Inspecting the physical condition of the boiler is important for overall maintenance, yet it might not reveal a malfunctioning safety valve unless a visual inspection shows clear issues with the valve itself. Thus, observing steam discharge when the boiler shouldn't be releasing steam is the most direct and reliable way to identify safety valve malfunctions