Automation System
Relay ladder logic is used in a PC because:

it is the best industrial control language ever developed.
it is impossible to write a control program for a machine in any other logic
None of these
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
All of these

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Automation System
Straight-line operations:

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

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