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

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

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Automation System
Light sensors:

come in a wide variety of mounting styles
None of these
cannot be used a s limit switches.
work in direct sunlight
never use infrared light as light source

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Automation System
What is the difference between integral and derivative control?

derivative control does not eliminate offset error
derivative control responds to a change in the rate of change in the error signal
All of these
None of these
integral control has slower response to an error signal.

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

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