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

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

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Automation System
The "walk-through" method of programming a robot involves:

physically moving the robot through all the motions it is to repeat
moving the robot from one location to another
None of these
All of these
walking through your suggested procedure with your supervisor prior to programming

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Automation System
A sequence controller:

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

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Automation System
D/A (digital to analog) conversion:

has to be sampled at 1/2 the highest input frequency
results in a binary code as the final output
both (b) and (c)
None of these
must be fed through a filter to reproduce the original signal accurately

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