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

ANSWER DOWNLOAD EXAMIANS APP

Process Control and Instrumentation
Thermodynamic celcius scale of temperature measurement is

Having an interval of 100° between ice point to steam point
Having an interval of 100° between ice point to steam point
Both A&B Here
Defined on the basis of melting point of ice and evaporation temperature of water vapor

ANSWER DOWNLOAD EXAMIANS APP