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

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

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Automation System
Light sensors:

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

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