Automation System
The "end-effector" of a robot:

All of these
None of these
is the robot "hand"
may have a gripping action
can be an actual tool

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Automation System
Numerical control:

All of these
is a method for producing an exact number of parts per hour
None of these
is a method for controlling the operation of a machine by means of a set of instructions
applies only to milling machines

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Automation System
Today, programmable controllers:

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

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