Automation System
For a type 1 system, the steady-state:

error for a velocity input is always zero
None of these
error for a step input is always zero
(a) and (c)
input for acceleration input is always non-zero

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Automation System
Pressure sensors:

All of these
use the piezoresistive effect in strain gauge sensors
use an aneroid chamber with a variable resistance output
use capacitive variations to sense pressure
None of these

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