Automation System
Light sensors:

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

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Automation System
The refresh-vector CRT uses which of the following techniques?

Makes changes on the image by increasing the anode voltage.
The beam constantly travels across the screen to turn on/off a series of pixels.
Creates images on the screen by scanning straight-line vectors between selected points.
Uses an electron gun to continuously flood the surface of the tube.
None of these

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Automation System
Microcomputer-based control sys-tems

All of these
None of these
will have more standard industrial application software available in the future.
will tend to increase in cost.
will just keep their present capability

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