Process Control and Instrumentation
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

Both B and C Here
Rusting of iron takes place
Embrittlement of iron occurs
Emf produced is very low of the order of microvolt

ANSWER DOWNLOAD EXAMIANS APP

Process Control and Instrumentation
Thermodynamic celcius scale of temperature measurement is

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

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Process Control and Instrumentation