Automation System
A dc servo motor:

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

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Automation System
Resolution in a CRT refers to:

the number of phosphor dots that react when hit by the electron beam
the speed at which the monitor can accept data from the computer
the number of addressable elements on the tube
None of these
the number of pixels in each square centimeter

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