Automation System
A servo controlled robot:

None of these
must be electrically driven
stop only at fixed points on each axis
must be hydraulically driven
can accelerate

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Automation System
A sequence controller:

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

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Automation System
An encoder:

can have only four keys
converts a binary number to a decimal number.
None of these
converts an input to a binary number
is used to send telegraph signals

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

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

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