Automation System
A sequence controller:

is no longer in widespread use
None of these
performs on/off control functions in relation to time.
is a mechanical only controller
is difficult to program

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Automation System
Pressure sensors:

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

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Automation System
Straight-line operations:

can include diagonal cuts if they aren't curved
None of these
must be parallel to one of the axes of the coordinate system
must be limited to two per workpiece
All of these

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Automation System
Trend analysis:

None of these
is used only in financial planning
requires a very expensive system to implement
can improve control system response
is a brand new concept

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