Automation System
Direct Numerical Control means:

eliminating computers from the manufacturing process
None of these
using several computers to control one large machine
complete elimination of a need for a human operator.
using one computer to control several machines

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Automation System
A process controller:

None of these
All of these
can solve a PID process control equation easily
is useful in a continuous process control application
can interface to digital and analog I/O

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Automation System
An encoder:

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

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