Automation System
An operational amplifier:

None of these
uses the principle of feedback
can be used to subtract two or more signals
can be used to sum two or more signals
All of these

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Automation System
An encoder:

converts a binary number to a decimal number.
is used to send telegraph signals
converts an input to a binary number
can have only four keys
None of these

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Automation System
CAE and CAM are linked through:

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

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