Automation System
An operational amplifier:

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

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Automation System
A stepping motor;

can index positional movement.
is a good choice where continuous rotation is needed
has a speed proportional to voltage input
has a commutator
None of these

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Automation System
Ergonomics refers to:

the human aspect of the environment around the workstation as well as the workstation itself
the level of involvement the operator has with the workstation
the cost relationship of the workstation versus productivity
the technology involved in the workstation itself
None of these

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