Automation System
For a type 2 system, the steady-state:

error for a step input is always zero
error for a velocity input is always zero
All of these
None of these
input for acceleration input is always non-zero

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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
the digital controller cannot handle integral mode
All of these
None of these

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Automation System
What is offset error?

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.
None of these
the difference between the sensor input and the absolute sensed parameter.

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Automation System
What is proportional control?

It has a discrete output for each error value
The controller output varies continuously over a range
None of these
All of these
The gain is independent of offset error.

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