Automation System
Ergonomics refers to:

the cost relationship of the workstation versus productivity
the technology involved in the workstation itself
None of these
the level of involvement the operator has with the workstation
the human aspect of the environment around the workstation as well as the workstation itself

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Automation System
A semi-continuous operation means:

the operation is continuous each shift, but stops between shifts
None of these
coffee breaks are allowed for the operator
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
a computer is a required part of the machine

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

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

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