Automation System
The axis of movement of a robot may include:

All of these
X-Y coordinate motion
None of these
elbow rotation
Wrist rotation

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Automation System
Today, programmable controllers:

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

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Automation System
A sequence controller:

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

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