Automation System
The "walk-through" method of programming a robot involves:

physically moving the robot through all the motions it is to repeat
moving the robot from one location to another
All of these
walking through your suggested procedure with your supervisor prior to programming
None of these

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Automation System
Digital signals:

can have three possible levels
are assigned values of 1 or 0 depending on the voltage level
have a frequency measured in units of hertz
have a sinusoidal shape.
None of these

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Automation System
Direct Numerical Control means:

using one computer to control several machines
using several computers to control one large machine
eliminating computers from the manufacturing process
None of these
complete elimination of a need for a human operator.

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