Automation System
The two types of relays in a PC are:

an output relay and a control relay
None of these
a retentive relay and a non-retentive relay
All of these
a control relay and a retentive relay

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Automation System
Sensors:

probably will not improve over the next decade
will be much smarter and more sophisticated in the future
are easily developed
None of these
are not important in automation

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Automation System
A sequence controller:

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

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Automation System
Resolution in a CRT refers to:

the speed at which the monitor can accept data from the computer
the number of pixels in each square centimeter
the number of phosphor dots that react when hit by the electron beam
None of these
the number of addressable elements on the tube

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