Automation System
Microcomputer-based control sys-tems

will tend to increase in cost.
will have more standard industrial application software available in the future.
will just keep their present capability
None of these
All of these

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Automation System
Numerical control:

is a method for controlling the operation of a machine by means of a set of instructions
applies only to milling machines
is a method for producing an exact number of parts per hour
All of these
None of these

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Automation System
Time proportioning control:

cannot use a TM990 micro¬computer
is less efficient than normal PID control
can be used on a PM550 programmable process controller
a and b above.
None of these

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