Automation System
The computer graphics system called SKETCHPAD was demonstrated at

None of these
University of Aston, Birmingham, 1960
Imperial college of Science and Technology, London, 1973
Cranfield Institute of Technology, London, 1962
Massachusetts Institute of Technology in 1963

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Automation System
How is the integral mode implemented on a digital controller?

All of these
the error signal is summed over a discrete time interval and accumulated by the controller
the error is divided into discrete amounts
the digital controller cannot handle integral mode
None of these

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Automation System
A continuous process is:

used only with analog controllers.
used only for simple tasks
one that never shuts down
None of these
self-contained in that raw materials enter the process and an identifiable products exits the process.

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Automation System
A dc servo motor:

uses a variable dc voltage for speed control
can provide precise position control
All of these
None of these
uses a tachometer for speed feedback

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Automation System
What is offset error?

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

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