Automation System
Compared to an open-loop system, a closed-loop control system is:

more stable
None of these
more complex
All of these
more accurate

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Automation System
Resolution in a CRT refers to:

None of these
the number of addressable elements on the tube
the number of pixels in each square centimeter
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

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Automation System
Today, programmable controllers:

All of these
are more powerful then the first controllers on the market
can be cost effective even when replacing just a few relays
are relatively low cost compared with the original digital equipment available for industrial control
None of these

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Automation System
A dc servo motor:

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

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