Question

what is the primary purpose of surface metal raceways?
○ to carry power, lighting, telephone or signal wires underground
○ to carry power, lighting, telephone or signal wires across a ceiling
○ to carry power, lighting, telephone or signal wires in outdoor locations
○ to carry power, lighting, telephone or signal wires by embedding them into the floor

Explanation:

Surface - metal raceways are used to protect and route electrical wires. They are often installed on surfaces such as walls or ceilings. They are not for underground, outdoor, or floor - embedded wiring in the context of this question. Their main use is for surface - mounted wiring on ceilings among the given options.

Answer:

to carry power, lighting, telephone or signal wires across a ceiling