Process Control and Instrumentation
Dead zone is the

Same as time constant
Same as transportation lag
Maximum change in the variable that does not change the reading of the instrument
None of these

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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

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
All of these

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