Automation System
An operational amplifier:

All of these
uses the principle of feedback
can be used to subtract two or more signals
can be used to sum two or more signals
None of these

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Automation System
A continuous process is:

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

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Automation System
The SKETCHPAD system

consisted of an cathode-ray oscilloscope driven by a Lincoln Tx2 computer where by graphical information was displayed on the screen.
is used for interactive Graphics
All of these
is expensive because it is sophisticated and make demands on the power and resources of the computer.
None of these

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