Automation System
A dc servo motor:

uses a tachometer for speed feedback
All of these
uses a variable dc voltage for speed control
None of these
can provide precise position control

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Automation System
CAE and CAM are linked through:

None of these
a common data base and communications system
assembly automation and tool production.
parts production and testing
NC tape programming and automated design

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Automation System
Light sensors:

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

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Automation System
A process controller:

None of these
can interface to digital and analog I/O
is useful in a continuous process control application
can solve a PID process control equation easily
All of these

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