Automation System
A venturi tube:

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

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Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

the system must make provision for new techniques.
technical assistance must be provided to the user.
None of these
there should be a common 3-D part description system.
the user must have access to both hardware and software

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Automation System
Numerical control:

is a method for producing an exact number of parts per hour
applies only to milling machines
All of these
is a method for controlling the operation of a machine by means of a set of instructions
None of these

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Automation System
An aneroid barometer

can measure only atmospheric pressure
is very unreliable
measures pressure by sensing deflection of an evacuated chambers.
can be used to measure gas or liquid flow rates
None of these

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