Automation System
Flood guns bombard the phosphor surface of the tube in which one of the following types of CRT technology?

None of these
Stroke CRT
Raster scan CRT
Direct view storage tube
Refresh-vector CRT

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Automation System
Today, programmable controllers:

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

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