Automation System
A program language:

All of these
is never machine dependent
is always machine dependent
defines the form of the instruction
None of these

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Automation System
Programmable controllers:

None of these
are widely used in many different industries
cannot perform functions other than relay logic
(a) and (c) above
are programmed using relay ladder logic

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Automation System
Trend analysis:

requires a very expensive system to implement
is used only in financial planning
None of these
can improve control system response
is a brand new concept

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