Automation System
Ergonomics refers to:

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

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Automation System
A dc servo motor:

can provide precise position control
uses a variable dc voltage for speed control
None of these
All of these
uses a tachometer for speed feedback

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Automation System
Today, programmable controllers:

None of these
are relatively low cost compared with the original digital equipment available for industrial control
All of these
can be cost effective even when replacing just a few relays
are more powerful then the first controllers on the market

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