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

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

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Automation System
A sequence controller:

is a mechanical only controller
None of these
is difficult to program
performs on/off control functions in relation to time.
is no longer in widespread use

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Automation System
A continuous process is:

one that never shuts down
None of these
used only for simple tasks
used only with analog controllers.
self-contained in that raw materials enter the process and an identifiable products exits the process.

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