Automation System
Robots can increase productivity because:

they do not take a vacation
All of these
production quality is uniform
None of these
they do not get tired

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Automation System
A stepping motor;

can index positional movement.
has a commutator
has a speed proportional to voltage input
is a good choice where continuous rotation is needed
None of these

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Automation System
Digital signals:

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

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Automation System
How is the integral mode implemented on a digital controller?

None of these
the error signal is summed over a discrete time interval and accumulated by the controller
All of these
the error is divided into discrete amounts
the digital controller cannot handle integral mode

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