Automation System
Automation normally means:

no change in jobs.
All of these
None of these
a net loss of jobs.
a net increase in jobs.

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Automation System
Semiconductor devices:

are less reliable than electro¬mechanical components
have a very short infant mortality period
usually have a very short MTBF (mean time between failure)
All of these
None of these

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Automation System
Today, programmable controllers:

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

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