Automation System
The method of solid modeling that defines the topology of faces, edges, and vertics, as well as data that defines the surface in which each face lies is called:

constructive solid geometry
isometric
layering
None of these
boundary representation

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Automation System
Digital signals:

None of these
are assigned values of 1 or 0 depending on the voltage level
have a frequency measured in units of hertz
can have three possible levels
have a sinusoidal shape.

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