Automation System
An encoder:

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

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Automation System
Numerical control:

applies only to milling machines
None of these
is a method for controlling the operation of a machine by means of a set of instructions
All of these
is a method for producing an exact number of parts per hour

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Automation System
Vision sensors:

All of these
can not improve much in the next decade
will more closely match the capabilities of the human eye
None of these
will remain very costly

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