Automation System
The two types of relays in a PC are:

an output relay and a control relay
a control relay and a retentive relay
None of these
All of these
a retentive relay and a non-retentive relay

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Automation System
Trend analysis:

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

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Automation System
An operating system:

All of these
provides ability for other programmers to understand the software structure
can help reduce software development time
None of these
is useless in most control applications

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