A Boiler repairer license class V is designated for what work?

The designation of a Boiler repairer license class V is particularly focused on specialized tasks associated with boilers that utilize a nuclear heat source. This specific classification is crucial because the repair and maintenance of nuclear boilers require a distinct set of skills, knowledge, and strict adherence to safety protocols due to the inherent risks involved with nuclear energy. These requirements ensure that only qualified individuals who understand the complexities and safety measures can work on such systems.

In contrast, the other choices pertain to different scopes of work or types of systems that do not require the same level of specialized training or certification focused on nuclear energy. For instance, the installation of standard hot water supply systems, repair of low-pressure boilers, and installation of non-boiler external piping involve processes governed by different regulations and standards. Thus, the class V license's specific focus on nuclear heat source boilers highlights its significance in ensuring safety and compliance in this highly regulated field.