Automation System
An encoder:

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

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Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

the user must have access to both hardware and software
the system must make provision for new techniques.
technical assistance must be provided to the user.
None of these
there should be a common 3-D part description system.

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Automation System
Most industrial control applications:

All of these
must have the process specified correctly to be successful
can be done more reliably using solid-state methods
None of these
can be solved using more than one method of control

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