Automation System
Ergonomics refers to:

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

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Automation System
A stepping motor;

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

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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
Time proportioning control:

can be used on a PM550 programmable process controller
is less efficient than normal PID control
a and b above.
None of these
cannot use a TM990 micro¬computer

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