Automation System
Analog and digital controllers:

None of these
can be changed with equal case
accept the same input signals
cost the same to build
All of these

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Automation System
An encoder:

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

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Automation System
Sensors:

are not important in automation
will be much smarter and more sophisticated in the future
are easily developed
None of these
probably will not improve over the next decade

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