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

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

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Process Control and Instrumentation
Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by

All of these
Reducing the volume of the receiving element to a minimum
Reducing the volume of the capillary to a minimum
Making the volume of thermometer bulb as large as conveniently possible

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