Automation System
What Is a process variable?

A controlled variable
None of these
All of these
A manipulated variable
A process parameter that changes value

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Automation System
A solenoid:

is spring operated
is widely used in industrial automation
is related to an aneroid
None of these
can be used only in de circuits

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

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

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