Which category is NOT one of the five main categories of the switchboards?

Monitoring fuel temperature does not belong to the five main categories of switchboards, which focus primarily on the distribution and control of electrical power systems. The main categories involve aspects essential to managing electrical power, such as controlling ship service generators, facilitating parallel operations with shore power for operational efficiency, and overseeing electric power distribution to various systems aboard.

In contrast, monitoring fuel temperature relates more to the operational parameters of fuel management and engine performance rather than the electrical distribution and control functions that define switchboards. The separation of these functions highlights the specialized nature of switchboards in focusing purely on electrical systems, rather than broader operational parameters related to fuel or other non-electrical systems.