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

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

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Automation System
A flip-flop:

remembers what was previously stored in it
(a) and (c)
is a combinational logic device
None of these
is a sequential logic device

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Automation System
A continuous process is:

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

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