Automation System
The rectangular boundary around a specific area on the display is called

None of these
a view plane
a window
a view point
a conic section

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

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 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

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Automation System
How is the integral mode implemented on a digital controller?

the digital controller cannot handle integral mode
the error signal is summed over a discrete time interval and accumulated by the controller
the error is divided into discrete amounts
None of these
All of these

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