Automation System
An encoder:

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

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Automation System
The program execution time:

will vary depending on the language used
cannot be changed once the program is written
All of these
must be slower than the fastest mechanical operation that is to be controlled
None of these

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Automation System
A process controller:

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

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