Automation System
Semiconductor devices:

have a very short infant mortality period
usually have a very short MTBF (mean time between failure)
All of these
None of these
are less reliable than electro¬mechanical components

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Automation System
An encoder:

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

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Automation System
Most industrial control applications:

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

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