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

None of these
the system must make provision for new techniques.
technical assistance must be provided to the user.
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
D/A (digital to analog) conversion:

results in a binary code as the final output
must be fed through a filter to reproduce the original signal accurately
both (b) and (c)
has to be sampled at 1/2 the highest input frequency
None of these

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Automation System
Digital signals:

have a frequency measured in units of hertz
are assigned values of 1 or 0 depending on the voltage level
have a sinusoidal shape.
can have three possible levels
None of these

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Automation System
What is offset error?

None of these
the difference between the sensor input and the absolute sensed parameter.
All of these
the difference between the control setpoint value and the actual value.
the difference between the controller output and the setting of the manipulated variable.

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