Automation System
Compared to an open-loop system, a closed-loop control system is:

more complex
All of these
more accurate
None of these
more stable

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Automation System
A venturi tube:

can be used to measure gas or liquid flow rates
is extremely difficult to use
None of these
is made only of metal
measures the presence of a liquid

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

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

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

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

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