Automation System
One advantage of a PC in industrial control is that it:

All of these
is unreliable because there are no moving parts
has a reliable long life compared to relay logic
None of these
is very difficult for the inexperienced programmer to understand

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Automation System
A sequence controller:

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

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Automation System
The main function(s) of computer in CAD is/are

All of these
To serve as an extension to the memory of the designer
None of these
To relieve the designer from routine repetitious tasks.
To enhance the analytical and logical power of the designer

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