Automation System
Digitizers can be converted from "dumb" to "smart" through the addition of:

a microprocessor
an electromagnetic coupling
None of these
a scanner
keyboard

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Automation System
A flip-flop:

None of these
is a combinational logic device
(a) and (c)
remembers what was previously stored in it
is a sequential logic device

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

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

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Automation System
Pressure sensors:

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

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