Automation System
The difference between CAD and CAM is that CAD software is directed at product design while CAM software is:

concerned with management programs
designed for communications
concerned with production and control of tool design
specifically for PC-board design
None of these

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Automation System
A venturi tube:

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

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Automation System
Speech recognition:

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

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