Final answer:
In construction and engineering, fixture connections requiring the removal of an access panel for servicing are considered 'Accessible'. This means they are not immediately visible but can be reached for maintenance. The term contrasts with 'exposed', 'concealed', and 'hidden', which describe different levels of visibility and accessibility.
Step-by-step explanation:
Fixture connections that require the removal of an access panel for servicing are considered B. Accessible. This term is used in engineering and construction to describe elements of building infrastructure that are not immediately visible or directly available, but can be reached for inspection or maintenance by removing an access panel or opening a door.
In contrast, 'exposed' would refer to installations that are visible and readily accessible without the need for removing any covers or panels, 'concealed' would generally refer to installations that are not visible or readily accessible, and 'hidden' might refer to something that is not intended to be found or accessed easily, potentially with no provision made for access at all.