Automation System
Most continuous control actuators:

use a 4 to 20 mA current loop input
None of these
are used with standard continuous control loop
(b) and (c) above
are of the time proportioning type

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

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

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Automation System
What is the process lag?

The time it takes for the mass of the process to respond to an input change.
The time it takes for the sensor to respond to a changed.
All of these
The lag in the error signal when the setpoint is changed.
None of these

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