Automation System
A proportional plus integral contro-ller can:

has no transient response
can increase the system type
can compensate for lag
both (b) and (c)
None of these

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

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

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Automation System
Vision sensors:

can not improve much in the next decade
will more closely match the capabilities of the human eye
will remain very costly
All of these
None of these

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Automation System
Semiconductor devices:

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

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