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

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

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Automation System
Sensors:

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

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Automation System
High-level languages:

None of these
are very difficult to use
cannot be used with automatic systems.
are "procedure-oriented"
require knowledge of the computer design

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