Automation System
The Ziegler-Nichols method:

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

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Automation System
Vision sensors:

None of these
All of these
can not improve much in the next decade
will remain very costly
will more closely match the capabilities of the human eye

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Automation System
What is offset error?

the difference between the control setpoint value and the actual value.
the difference between the sensor input and the absolute sensed parameter.
All of these
the difference between the controller output and the setting of the manipulated variable.
None of these

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Automation System
Trend analysis:

requires a very expensive system to implement
can improve control system response
is a brand new concept
None of these
is used only in financial planning

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