Automation System
VLSI (very large scale integrated circuits) logic:

None of these
will not be available in this decade
All of these
will result in lower cost, higher capability electronic equipment
means more costly electronic products in the future

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Automation System
Relay ladder logic is used in a PC because:

All of these
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
None of these
it is the best industrial control language ever developed.
it is impossible to write a control program for a machine in any other logic

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Automation System
What is proportional control?

All of these
The gain is independent of offset error.
It has a discrete output for each error value
The controller output varies continuously over a range
None of these

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