Automation System
The two types of relays in a PC are:

an output relay and a control relay
All of these
a retentive relay and a non-retentive relay
None of these
a control relay and a retentive relay

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

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

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Automation System
Straight-line operations:

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

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