What function does a Boiler repairer license class II specifically exclude?

A Boiler repairer license class II specifically excludes the repair of nuclear heat source boilers due to the complex and highly regulated nature of nuclear systems. These boilers operate under stringent safety protocols and require specialized knowledge, training, and certification that goes beyond what is typically necessary for other types of boiler repairs. Nuclear facilities are subject to rigorous oversight from government agencies, and only those with specialized nuclear training and licensing are permitted to work on such systems. This distinction is crucial to ensure safety and compliance in environments where system failures could have severe consequences.

In contrast, the other options pertain to areas typically covered under a class II license or involve requirements that are potentially met by such a license. Repairing low-pressure and hot water supply boilers, for instance, falls within the typical training and certification offered to boiler repairers, while welding may be a specific skill requirement that does not necessarily relate to the overall licensing but could be a part of the capabilities a repairer should develop.