Automation System
An operational amplifier:

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

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Automation System
The "walk-through" method of programming a robot involves:

walking through your suggested procedure with your supervisor prior to programming
None of these
moving the robot from one location to another
physically moving the robot through all the motions it is to repeat
All of these

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