Automation System
Which of the following symbol modes are used to input of graphics to General CAD system?

All of these
Dimension and Alphanumeric mode
Arc and Circle mode
None of these
Live and Rectangle mode

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Automation System
Today, programmable controllers:

can be cost effective even when replacing just a few relays
All of these
None of these
are more powerful then the first controllers on the market
are relatively low cost compared with the original digital equipment available for industrial control

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Automation System
Semiconductor devices:

have a very short infant mortality period
usually have a very short MTBF (mean time between failure)
All of these
are less reliable than electro¬mechanical components
None of these

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Automation System
Microcomputer-based control sys-tems

All of these
will tend to increase in cost.
None of these
will just keep their present capability
will have more standard industrial application software available in the future.

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