Automation System
Numerical control:

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

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Automation System
Most industrial control applications:

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

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Automation System
How is the integral mode implemented on a digital controller?

the error is divided into discrete amounts
the error signal is summed over a discrete time interval and accumulated by the controller
None of these
the digital controller cannot handle integral mode
All of these

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Automation System
A venturi tube:

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

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