Automation System
The Ziegler-Nichols method:

can be used to determine gain factors of a PI loop
None of these
is a graphical solution method
a and b above
is a method of control

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Automation System
The use of specialized workstations:

None of these
reduces the host computer workload and allows more users
reduces the host computer workload
provides limited growth potentials for 3-D
has a high cost-performance tradeoff

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Automation System
A process controller:

None of these
can solve a PID process control equation easily
can interface to digital and analog I/O
All of these
is useful in a continuous process control application

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