Automation System
The "snap" command feature in both AutoCAD and VersaCAD ensure that:

definable center markers are entered.
template lines can be removed
objects are entered at specific intervals.
None of these
identified data are automatically segmented

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Automation System
Light sensors:

come in a wide variety of mounting styles
None of these
work in direct sunlight
cannot be used a s limit switches.
never use infrared light as light source

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

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

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Automation System
What is proportional control?

It has a discrete output for each error value
None of these
The gain is independent of offset error.
All of these
The controller output varies continuously over a range

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