Automation System
A venturi tube:

is made only of metal
None of these
measures the presence of a liquid
is extremely difficult to use
can be used to measure gas or liquid flow rates

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Automation System
Trend analysis:

is used only in financial planning
None of these
requires a very expensive system to implement
is a brand new concept
can improve control system response

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Automation System
Speech recognition:

will be used in more applications as the technology matures.
None of these
is already widely used in industrial controls
All of these
will never be used in industrial controls

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