Automation System
If the transient response of a system is overdamped:

None of these
the value of the output never stabilizes.
the value of the output exceeds the value of the input at times during the transient period.
All of these
the value of the output never exceeds the value of the input during the transient period.

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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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