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

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

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Automation System
Digital signals:

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

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