Process Control and Instrumentation
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Reducing value of Kc
Introducing integral control
None of these
Introducing derivative control

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Process Control and Instrumentation
Accurate temperature measurement performance of a radiation pyrometer can not be affected, if the

Object and surrounding are at almost the same temperature
Object has varying emissivity
Object is transparent
Enhancement or attentuation of redia-tion occurs in the sighting path

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