Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

technical assistance must be provided to the user.
there should be a common 3-D part description system.
the system must make provision for new techniques.
the user must have access to both hardware and software
None of these

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Automation System
Digital signals:

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

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Automation System
Straight-line operations:

can include diagonal cuts if they aren't curved
None of these
must be parallel to one of the axes of the coordinate system
must be limited to two per workpiece
All of these

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